Add six-month domain and broker monitoring

README.md

@@ -50,6 +50,7 @@ Operational documentation:
 - [Broker location, health, timeout, and recovery](docs/broker-operations.md)
 - [Windows domain join and remote-access onboarding](docs/windows-client-onboarding.md)
 - [Required Credential Provider client enrollment](docs/client-enrollment.md)
+- [Domain monitoring, usage reports, and six-month retention](docs/monitoring.md)
 - [Decision: do not persist password verifiers in Redis](docs/decisions/0001-no-password-cache.md)
 
 | Prefix | Role | Default OU |

docs/architecture.md

@@ -85,7 +85,10 @@ The generic SGU credential is rendered as a dedicated branded tile instead of
 being grouped below the anonymous **Other user** tile. Machine policy assigns
 the SGU CLSID as the default provider, hides the last signed-in identity, and
 disables local-user enumeration while retaining the built-in Microsoft password
-provider and its **Other user** recovery path. It enumerates one
+provider and its **Other user** recovery path. The computer GPO also applies
+Windows' native default account picture to named Windows accounts; client
+enrollment installs the La Salle mascot bitmap in Windows' standard account-picture
+location before that GPO takes effect. It enumerates one
 `CPFT_TILE_IMAGE` and places the `CPFT_LARGE_TEXT` heading immediately after it
 with `CPFS_DISPLAY_IN_SELECTED_TILE`. LogonUI owns field typography and vertical
 tile order: on Windows 10 and 11, the account-name title used by **Other user**
@@ -102,6 +105,21 @@ to `OU=Laboratorio`; it suppresses first-logon/privacy/diagnostic prompts,
 disables location, and enforces always-on display, sleep, and hibernation
 settings for managed clients.
 
+The domain controller is also the source-initiated Windows Event Collector for
+managed laboratory computers. Kerberos-authenticated WEF sends only selected
+logon/logoff, failed-logon, reconnect/disconnect, and operating-system power
+events to `ForwardedEvents`. Daily EVTX archives are retained for 183 days, and
+a five-minute server-side inventory records WinRM reachability and AD last-logon
+metadata. Session-duration reports correlate Windows logon IDs; no password or
+SGU HTTP payload is included in this monitoring path.
+
+Broker diagnostics use the dedicated `SGU Auth Broker` Windows log with stable
+event IDs for authorization outcomes, SGU network/timeout failures, unexpected
+profile HTML, partial enrichment, and AD synchronization warnings. The same
+daily maintenance task archives that log for 183 days. Messages identify the
+institutional user and role but never include passwords, password verifiers, or
+raw SGU HTML.
+
 Per-user synchronization is serialized inside the broker to prevent concurrent
 create/reset races. Production deployments should run the broker as a gMSA with
 delegated create-user, move-user, write-property, enable-account, and reset-password

docs/monitoring.md

@@ -0,0 +1,118 @@
+# Monitoreo y registros de uso
+
+El dominio usa **Windows Event Forwarding (WEF)** y el servicio nativo
+**Windows Event Collector (Wecsvc)**. No instala un agente de telemetría y no
+registra contraseñas, contenido de escritorio ni páginas visitadas.
+
+## Datos recopilados
+
+La suscripción `SGU-Lab-Monitoring` recibe desde los equipos de
+`OU=Laboratorio`:
+
+- inicios de sesión correctos y fallidos (`4624` y `4625`);
+- cierre de sesión, desconexión y reconexión (`4634`, `4647`, `4778`, `4779`);
+- arranque, apagado, reinicio y apagado inesperado (`12`, `13`, `41`, `1074`,
+  `6005`, `6006`, `6008`).
+
+Con el identificador de sesión de Windows se obtiene quién usó qué equipo,
+hora de entrada, hora de salida y duración. Los eventos fallidos conservan el
+estado de Windows, pero nunca la contraseña introducida.
+
+El broker escribe un registro separado de Windows llamado `SGU Auth Broker`.
+Cada solicitud válida queda correlacionada mediante usuario institucional,
+rol, `TraceId`, resultado y tiempo total. Los Event ID estables distinguen:
+
+- `1000` autorización completada; `1001` credenciales rechazadas; `1002`
+  servicio no disponible; `1003` solicitud inválida;
+- `1100` SGU aceptó la autenticación; `1101` timeout; `1102` fallo de red/DNS;
+- `1200` enriquecimiento completado y cantidad de campos; `1201` HTML sin los
+  IDs admitidos; `1202` timeout; `1203` excepción; `1204` página opcional no
+  disponible;
+- `1300` fallo de sincronización AD; `1301` metadatos opcionales no aplicados;
+  `1302` membresía RDP opcional no aplicada.
+
+No se almacena HTML, contraseña, hash de contraseña ni contenido de la
+respuesta SGU.
+
+## Retención
+
+`ForwardedEvents` tiene un límite de 512 MB. La tarea
+`SGU-Monitoring-Retention` lo archiva diariamente en:
+
+```text
+C:\ProgramData\SGU\Monitoring\Archive
+```
+
+El mismo ciclo archiva `SGU Auth Broker` en `Archive\Broker`. Solo elimina
+archivos `.evtx` cuya antigüedad supera **183 días**. La tarea
+`SGU-Monitoring-Inventory` actualiza cada cinco minutos el inventario en:
+
+```text
+C:\ProgramData\SGU\Monitoring\Reports\machine-status.json
+C:\ProgramData\SGU\Monitoring\Reports\machine-status.csv
+```
+
+`Encendida` significa que WinRM respondió en TCP 5985. `Apagada o inaccesible`
+también puede significar que el equipo está arrancando, perdió la red o tiene
+el puerto bloqueado; Active Directory por sí solo no conoce el estado eléctrico
+instantáneo de un PC.
+
+## Consultas
+
+En el servidor, como administrador:
+
+```powershell
+# Estado actual de las máquinas
+Get-Content 'C:\ProgramData\SGU\Monitoring\Reports\machine-status.json' -Raw |
+    ConvertFrom-Json | Format-Table ComputerName,Status,IPv4Address,LastDomainLogon
+
+# Uso de los últimos seis meses
+& 'C:\ProgramData\SGU\Monitoring\Get-SguUsageReport.ps1' |
+    Format-Table User,Computer,StartedAt,EndedAt,DurationMinutes,Result
+
+# Un usuario o una máquina
+& 'C:\ProgramData\SGU\Monitoring\Get-SguUsageReport.ps1' -UserName AL201428
+& 'C:\ProgramData\SGU\Monitoring\Get-SguUsageReport.ps1' -ComputerName LCI-W11-01
+
+# Diagnóstico del broker; admite -UserName, -Level, -EventId y -Text
+& 'C:\ProgramData\SGU\Monitoring\Get-SguBrokerLog.ps1' -UserName AL201428 |
+    Format-Table TimeCreated,Level,EventId,EventName,Message -Wrap
+& 'C:\ProgramData\SGU\Monitoring\Get-SguBrokerLog.ps1' -Level Warning
+
+# Exportación
+& 'C:\ProgramData\SGU\Monitoring\Get-SguUsageReport.ps1' `
+    -OutputCsv 'C:\ProgramData\SGU\Monitoring\Reports\usage.csv'
+```
+
+Para revisar la salud del colector:
+
+```powershell
+Get-Service Wecsvc
+wecutil enum-subscription
+wecutil get-subscriptionruntimestatus SGU-Lab-Monitoring
+Get-WinEvent -LogName ForwardedEvents -MaxEvents 20
+Get-WinEvent -LogName 'SGU Auth Broker' -MaxEvents 20
+Get-ScheduledTask -TaskName 'SGU-Monitoring-*'
+```
+
+> **Windows Server 2025:** no consultes `ForwardedEvents` mediante
+> `-FilterHashtable` ni XPath. Algunas compilaciones tienen una regresión que
+> termina el servicio Windows Event Log (`wevtsvc.dll`, `0xc0000420`). El
+> reporte incluido lee el canal sin consulta estructurada y aplica los filtros
+> en memoria.
+
+El bootstrap del servidor crea el colector, la suscripción y las tareas. El GPO
+`SGU - Windows client experience` publica el Subscription Manager por FQDN. El
+bootstrap y la reparación diaria del cliente habilitan las subcategorías de
+auditoría y el acceso de `NETWORK SERVICE` al registro Security.
+
+La suscripción usa `ContentFormat=Events`: conserva el XML original que emplea
+el reporte y evita que cada cliente tenga que renderizar texto localizado antes
+de enviarlo.
+
+Referencias de Microsoft:
+
+- <https://learn.microsoft.com/en-us/windows/win32/wec/setting-up-a-source-initiated-subscription>
+- <https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/wecutil>
+- <https://learn.microsoft.com/en-us/windows/security/threat-protection/auditing/event-4624>
+- <https://learn.microsoft.com/en-us/windows/security/threat-protection/auditing/event-4634>

scripts/Deploy-AuthBroker.ps1

@@ -46,6 +46,8 @@ param(
 $ErrorActionPreference = 'Stop'
 $serviceName = 'SGUAuthBroker'
 $installPath = Join-Path $env:ProgramFiles 'SGU\AuthBroker'
+$brokerEventLogName = 'SGU Auth Broker'
+$brokerEventSource = 'SGU.AuthBroker.Operational'
 $normalizedClientThumbprints = @($AllowedClientThumbprints | ForEach-Object { $_ -replace ' ', '' })
 if ($normalizedClientThumbprints.Where({ $_.Length -ne 40 }).Count -gt 0) {
     throw 'Client certificate thumbprints must contain exactly 40 hexadecimal characters.'
@@ -129,6 +131,14 @@ foreach ($file in @('SGU.AuthBroker.exe', 'SGU.AuthBroker.dll', 'appsettings.jso
 }
 
 $productionSettings = @{
+    Logging = @{
+        EventLog = @{
+            LogLevel = @{
+                Default = 'Information'
+                'Microsoft.AspNetCore' = 'Warning'
+            }
+        }
+    }
     Kestrel = @{
         Endpoints = @{
             Https = @{
@@ -143,6 +153,9 @@ $productionSettings = @{
         }
     }
     Broker = @{
+        Diagnostics = @{
+            UseDedicatedEventLog = $true
+        }
         Tls = @{
             AllowedClientThumbprints = $normalizedClientThumbprints
             CheckCertificateRevocation = -not $DisableCertificateRevocationCheckForLab
@@ -198,6 +211,18 @@ if ($PSCmdlet.ShouldProcess($installPath, 'Install the SGU Authentication Broker
         $settingsJson,
         $utf8WithoutBom)
 
+    if ([Diagnostics.EventLog]::SourceExists($brokerEventSource)) {
+        $registeredLog = [Diagnostics.EventLog]::LogNameFromSourceName($brokerEventSource, '.')
+        if (-not $registeredLog.Equals($brokerEventLogName, [StringComparison]::OrdinalIgnoreCase)) {
+            throw "Event source $brokerEventSource is already registered to $registeredLog."
+        }
+    }
+    else {
+        New-EventLog -LogName $brokerEventLogName -Source $brokerEventSource
+    }
+    Limit-EventLog -LogName $brokerEventLogName -MaximumSize 268435456 `
+        -OverflowAction OverwriteAsNeeded
+
     if (-not (Get-Service -Name $serviceName -ErrorAction SilentlyContinue)) {
         New-Service -Name $serviceName `
             -DisplayName 'SGU Authentication Broker' `
@@ -249,4 +274,5 @@ if ($PSCmdlet.ShouldProcess($installPath, 'Install the SGU Authentication Broker
     Start-Service -Name $serviceName
 }
 
-Get-Service -Name $serviceName | Select-Object Name, Status, StartType
+Get-Service -Name $serviceName | Select-Object Name, Status, StartType,
+    @{ Name = 'EventLog'; Expression = { $brokerEventLogName } }

scripts/Enable-LabRemoteAccess.ps1

@@ -20,6 +20,20 @@ $remoteDesktopUsersSid = [Security.Principal.SecurityIdentifier]::new('S-1-5-32-
 $remoteDesktopUsersGroup = ($remoteDesktopUsersSid.Translate([Security.Principal.NTAccount]).Value -split '\\', 2)[1]
 
 if ($PSCmdlet.ShouldProcess($env:COMPUTERNAME, "Enable RDP and grant $RemoteDesktopPrincipal access")) {
+    function Invoke-PowerCfgBestEffort {
+        param([Parameter(Mandatory)][string[]]$Arguments)
+
+        # Start-Process keeps powercfg's policy-override diagnostic on its own
+        # stderr stream. In PowerShell 7, directly invoking that native command
+        # turns stderr into a terminating ErrorRecord under $ErrorActionPreference
+        # = 'Stop', which previously aborted this unrelated remediation work.
+        $process = Start-Process -FilePath "$env:SystemRoot\System32\powercfg.exe" `
+            -ArgumentList $Arguments -Wait -PassThru -WindowStyle Hidden
+        if ($process.ExitCode -ne 0) {
+            Write-Warning "powercfg $($Arguments -join ' ') returned exit code $($process.ExitCode); continuing enrollment repair."
+        }
+    }
+
     foreach ($powerChange in @(
         @('monitor-timeout-ac', '0'),
         @('monitor-timeout-dc', '0'),
@@ -27,15 +41,9 @@ if ($PSCmdlet.ShouldProcess($env:COMPUTERNAME, "Enable RDP and grant $RemoteDesk
         @('standby-timeout-dc', '0'),
         @('hibernate-timeout-ac', '0'),
         @('hibernate-timeout-dc', '0'))) {
-        & powercfg.exe /change $powerChange[0] $powerChange[1]
-        if ($LASTEXITCODE -ne 0) {
-            throw "powercfg /change $($powerChange[0]) failed with exit code $LASTEXITCODE."
-        }
-    }
-    & powercfg.exe /hibernate off
-    if ($LASTEXITCODE -ne 0) {
-        throw "powercfg /hibernate off failed with exit code $LASTEXITCODE."
+        Invoke-PowerCfgBestEffort -Arguments @('/change', $powerChange[0], $powerChange[1])
     }
+    Invoke-PowerCfgBestEffort -Arguments @('/hibernate', 'off')
 
     Set-ItemProperty -LiteralPath 'HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server' `
         -Name fDenyTSConnections -Type DWord -Value 0

scripts/Enable-SguClientMonitoring.ps1

@@ -0,0 +1,61 @@
+[CmdletBinding(SupportsShouldProcess)]
+param()
+
+$ErrorActionPreference = 'Stop'
+
+$identity = [Security.Principal.WindowsIdentity]::GetCurrent()
+$principal = [Security.Principal.WindowsPrincipal]::new($identity)
+if (-not $principal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
+    throw 'Run this script from an elevated Windows PowerShell session.'
+}
+
+# Use invariant audit subcategory GUIDs so this works on English and Spanish
+# installations. Logon, logoff, and other logon/logoff events provide the
+# session identifiers required to correlate usage centrally.
+$auditSubcategories = @(
+    '{0CCE9215-69AE-11D9-BED3-505054503030}', # Logon
+    '{0CCE9216-69AE-11D9-BED3-505054503030}', # Logoff
+    '{0CCE921C-69AE-11D9-BED3-505054503030}'  # Other Logon/Logoff Events
+)
+
+if ($PSCmdlet.ShouldProcess($env:COMPUTERNAME, 'Enable SGU session auditing and event forwarding prerequisites')) {
+    foreach ($subcategory in $auditSubcategories) {
+        & auditpol.exe /set "/subcategory:$subcategory" /success:enable /failure:enable | Out-Null
+        if ($LASTEXITCODE -ne 0) {
+            throw "auditpol failed for subcategory $subcategory with exit code $LASTEXITCODE."
+        }
+    }
+
+    # Security events are read by the Windows Event Forwarding plug-in under
+    # NETWORK SERVICE. Resolve both principals by SID for localized Windows.
+    $eventLogReadersSid = [Security.Principal.SecurityIdentifier]::new('S-1-5-32-573')
+    $networkServiceSid = [Security.Principal.SecurityIdentifier]::new('S-1-5-20')
+    $members = @(Get-LocalGroupMember -SID $eventLogReadersSid -ErrorAction SilentlyContinue)
+    $eventLogReaderMembershipChanged = $false
+    if ($members.SID.Value -notcontains $networkServiceSid.Value) {
+        $networkServiceAccount = $networkServiceSid.Translate([Security.Principal.NTAccount]).Value
+        Add-LocalGroupMember -SID $eventLogReadersSid -Member $networkServiceAccount
+        $eventLogReaderMembershipChanged = $true
+    }
+
+    Set-Service WinRM -StartupType Automatic
+    if ((Get-Service WinRM).Status -ne 'Running') {
+        Start-Service WinRM
+    }
+    elseif ($eventLogReaderMembershipChanged) {
+        Restart-Service WinRM -Force
+    }
+
+    & wevtutil.exe set-log Security /maxsize:268435456 /retention:false /autobackup:false
+    if ($LASTEXITCODE -ne 0) {
+        throw "wevtutil failed to configure the local Security log with exit code $LASTEXITCODE."
+    }
+}
+
+[pscustomobject]@{
+    ComputerName = $env:COMPUTERNAME
+    WinRM = (Get-Service WinRM).Status.ToString()
+    SecurityLogMaximumBytes = (Get-WinEvent -ListLog Security).MaximumSizeInBytes
+    AuditSubcategories = $auditSubcategories
+    EventForwardingPolicy = Test-Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\EventLog\EventForwarding\SubscriptionManager'
+}

scripts/Enroll-SguDomainClient.ps1

@@ -39,7 +39,8 @@ foreach ($scriptName in @(
     'Install-SguEnrollmentGuard.ps1',
     'Test-SguClientEnrollment.ps1',
     'Repair-SguClientEnrollment.ps1',
-    'Enable-LabRemoteAccess.ps1')) {
+    'Enable-LabRemoteAccess.ps1',
+    'Enable-SguClientMonitoring.ps1')) {
     if (-not (Test-Path -LiteralPath (Join-Path $PSScriptRoot $scriptName) -PathType Leaf)) {
         throw "$scriptName must be beside Enroll-SguDomainClient.ps1."
     }
@@ -96,6 +97,7 @@ if ($PSCmdlet.ShouldProcess($env:COMPUTERNAME, 'Install and verify SGU before jo
         & (Join-Path $PSScriptRoot 'Enable-LabRemoteAccess.ps1') `
             -RemoteDesktopPrincipal $RemoteDesktopPrincipal `
             -EnableAdministrativeFirewallGroups | Out-Null
+        & (Join-Path $PSScriptRoot 'Enable-SguClientMonitoring.ps1') | Out-Null
         return & (Join-Path $PSScriptRoot 'Test-SguClientEnrollment.ps1') `
             -RequireDomainJoined `
             -RequireRemoteAccess `

scripts/Get-SguBrokerLog.ps1

@@ -0,0 +1,81 @@
+#Requires -Version 5.1
+[CmdletBinding()]
+param(
+    [datetime]$Since = (Get-Date).AddDays(-183),
+    [datetime]$Until = (Get-Date),
+    [string]$UserName,
+    [ValidateSet('Critical','Error','Warning','Information','Verbose')]
+    [string]$Level,
+    [int[]]$EventId,
+    [string]$Text,
+    [string]$MonitoringRoot = 'C:\ProgramData\SGU\Monitoring',
+    [string]$BrokerEventLogName = 'SGU Auth Broker',
+    [string]$OutputCsv
+)
+
+$ErrorActionPreference = 'Stop'
+$events = [Collections.Generic.List[object]]::new()
+$eventNames = @{
+    900 = 'BrokerStarted'
+    1000 = 'AuthenticationAuthorized'
+    1001 = 'AuthenticationRejected'
+    1002 = 'AuthenticationUnavailable'
+    1003 = 'AuthenticationInvalidRequest'
+    1100 = 'SguAuthenticationAccepted'
+    1101 = 'SguAuthenticationTimeout'
+    1102 = 'SguAuthenticationNetworkFailure'
+    1200 = 'ProfileEnrichmentCompleted'
+    1201 = 'ProfileHtmlUnexpected'
+    1202 = 'ProfileEnrichmentTimeout'
+    1203 = 'ProfileEnrichmentFailure'
+    1204 = 'ProfilePageUnavailable'
+    1300 = 'DirectorySynchronizationFailure'
+    1301 = 'DirectoryOptionalMetadataFailure'
+    1302 = 'DirectoryGroupMembershipFailure'
+}
+
+# Keep these reads unfiltered. Besides making archived and current logs behave
+# identically, this avoids the Windows Server 2025 ForwardedEvents query defect.
+if (Get-WinEvent -ListLog $BrokerEventLogName -ErrorAction SilentlyContinue) {
+    Get-WinEvent -LogName $BrokerEventLogName -ErrorAction SilentlyContinue |
+        Where-Object { $_.TimeCreated -ge $Since -and $_.TimeCreated -le $Until } |
+        ForEach-Object { $events.Add($_) }
+}
+
+$brokerArchiveRoot = Join-Path $MonitoringRoot 'Archive\Broker'
+Get-ChildItem -LiteralPath $brokerArchiveRoot -Filter '*.evtx' -File -ErrorAction SilentlyContinue |
+    Where-Object LastWriteTime -ge $Since.AddDays(-1) |
+    ForEach-Object {
+        try {
+            Get-WinEvent -Path $_.FullName -Oldest -ErrorAction Stop |
+                Where-Object { $_.TimeCreated -ge $Since -and $_.TimeCreated -le $Until } |
+                ForEach-Object { $events.Add($_) }
+        }
+        catch {
+            Write-Warning "Could not read broker archive $($_.FullName): $($_.Exception.Message)"
+        }
+    }
+
+$result = @($events | Where-Object {
+    (-not $UserName -or $_.Message -like "*$UserName*") -and
+    (-not $Level -or $_.LevelDisplayName -eq $Level) -and
+    (-not $EventId -or $_.Id -in $EventId) -and
+    (-not $Text -or $_.Message -like "*$Text*")
+} | Sort-Object TimeCreated -Descending | ForEach-Object {
+    [pscustomobject]@{
+        TimeCreated = $_.TimeCreated
+        Level = $_.LevelDisplayName
+        EventId = $_.Id
+        EventName = $eventNames[[int]$_.Id]
+        Provider = $_.ProviderName
+        Message = $_.Message
+    }
+})
+
+if ($OutputCsv) {
+    $resolvedOutput = [IO.Path]::GetFullPath($OutputCsv)
+    New-Item -ItemType Directory -Path (Split-Path $resolvedOutput -Parent) -Force | Out-Null
+    $result | Export-Csv -LiteralPath $resolvedOutput -NoTypeInformation -Encoding UTF8
+}
+
+$result

scripts/Get-SguUsageReport.ps1

@@ -0,0 +1,176 @@
+#Requires -Version 5.1
+[CmdletBinding()]
+param(
+    [datetime]$Since = (Get-Date).AddDays(-183),
+    [datetime]$Until = (Get-Date),
+    [string]$UserName,
+    [string]$ComputerName,
+    [string]$MonitoringRoot = 'C:\ProgramData\SGU\Monitoring',
+    [string]$OutputCsv
+)
+
+$ErrorActionPreference = 'Stop'
+$eventIds = @(4624,4625,4634,4647,4778,4779,6005,6006,6008)
+$events = [Collections.Generic.List[object]]::new()
+
+try {
+    # Windows Server 2025 can crash the Windows Event Log service when a
+    # structured query is evaluated against ForwardedEvents (wevtsvc.dll,
+    # exception 0xc0000420). Read the channel without a server-side query and
+    # apply every predicate in this process instead.
+    Get-WinEvent -LogName 'ForwardedEvents' -ErrorAction Stop |
+        Where-Object {
+            $_.Id -in $eventIds -and
+            $_.TimeCreated -ge $Since -and
+            $_.TimeCreated -le $Until
+        } |
+        ForEach-Object { $events.Add($_) }
+}
+catch [System.Exception] {
+    if ($_.FullyQualifiedErrorId -notlike 'NoMatchingEventsFound*') {
+        Write-Verbose $_.Exception.Message
+    }
+}
+
+$archiveRoot = Join-Path $MonitoringRoot 'Archive'
+Get-ChildItem -LiteralPath $archiveRoot -Filter '*.evtx' -File -ErrorAction SilentlyContinue |
+    Where-Object LastWriteTime -ge $Since.AddDays(-1) |
+    ForEach-Object {
+        try {
+            Get-WinEvent -Path $_.FullName -Oldest -ErrorAction Stop |
+                Where-Object { $_.Id -in $eventIds -and $_.TimeCreated -ge $Since -and $_.TimeCreated -le $Until } |
+                ForEach-Object { $events.Add($_) }
+        }
+        catch {
+            Write-Warning "Could not read archive $($_.FullName): $($_.Exception.Message)"
+        }
+    }
+
+function Get-EventData {
+    param([Parameter(Mandatory)]$EventRecord)
+
+    $xml = [xml]$EventRecord.ToXml()
+    $data = @{}
+    foreach ($item in @($xml.Event.EventData.Data)) {
+        if ($item.Name) {
+            $data[[string]$item.Name] = [string]$item.'#text'
+        }
+    }
+    [pscustomobject]@{
+        Computer = [string]$xml.Event.System.Computer
+        Data = $data
+    }
+}
+
+$openSessions = @{}
+$rows = [Collections.Generic.List[object]]::new()
+$ignoredUsers = @('ANONYMOUS LOGON','DWM-1','DWM-2','DWM-3','LOCAL SERVICE','NETWORK SERVICE','SYSTEM','UMFD-0','UMFD-1','UMFD-2','UMFD-3')
+
+foreach ($eventRecord in @($events | Sort-Object TimeCreated,RecordId)) {
+    $parsed = Get-EventData -EventRecord $eventRecord
+    $machine = ($parsed.Computer -split '\.')[0].ToUpperInvariant()
+    $data = $parsed.Data
+
+    if ($eventRecord.Id -in 6005,6006,6008) {
+        foreach ($key in @($openSessions.Keys | Where-Object { $_ -like "$machine|*" })) {
+            $session = $openSessions[$key]
+            $rows.Add([pscustomobject]@{
+                User = $session.User
+                Computer = $machine
+                StartedAt = $session.StartedAt
+                EndedAt = $eventRecord.TimeCreated
+                Duration = $eventRecord.TimeCreated - $session.StartedAt
+                DurationMinutes = [math]::Round(($eventRecord.TimeCreated - $session.StartedAt).TotalMinutes, 2)
+                LogonType = $session.LogonType
+                Result = 'Interrumpida por apagado o reinicio'
+                FailureStatus = $null
+            })
+            $openSessions.Remove($key)
+        }
+        continue
+    }
+
+    if ($eventRecord.Id -eq 4625) {
+        $failedUser = [string]$data.TargetUserName
+        if ($failedUser -and $failedUser -notlike '*$' -and $failedUser.ToUpperInvariant() -notin $ignoredUsers) {
+            $rows.Add([pscustomobject]@{
+                User = if ($data.TargetDomainName) { "$($data.TargetDomainName)\$failedUser" } else { $failedUser }
+                Computer = $machine
+                StartedAt = $eventRecord.TimeCreated
+                EndedAt = $eventRecord.TimeCreated
+                Duration = [timespan]::Zero
+                DurationMinutes = 0
+                LogonType = [string]$data.LogonType
+                Result = 'Fallida'
+                FailureStatus = "$($data.Status)/$($data.SubStatus)"
+            })
+        }
+        continue
+    }
+
+    if ($eventRecord.Id -eq 4624) {
+        $logonType = [string]$data.LogonType
+        $targetUser = [string]$data.TargetUserName
+        if ($logonType -notin @('2','10','11') -or -not $targetUser -or $targetUser -like '*$' -or
+            $targetUser.ToUpperInvariant() -in $ignoredUsers) {
+            continue
+        }
+        $logonId = [string]$data.TargetLogonId
+        $key = "$machine|$logonId"
+        $openSessions[$key] = [pscustomobject]@{
+            User = if ($data.TargetDomainName) { "$($data.TargetDomainName)\$targetUser" } else { $targetUser }
+            StartedAt = $eventRecord.TimeCreated
+            LogonType = $logonType
+        }
+        continue
+    }
+
+    if ($eventRecord.Id -in 4634,4647) {
+        $logonId = if ($eventRecord.Id -eq 4634) { [string]$data.TargetLogonId } else { [string]$data.SubjectLogonId }
+        $key = "$machine|$logonId"
+        if ($openSessions.ContainsKey($key)) {
+            $session = $openSessions[$key]
+            $rows.Add([pscustomobject]@{
+                User = $session.User
+                Computer = $machine
+                StartedAt = $session.StartedAt
+                EndedAt = $eventRecord.TimeCreated
+                Duration = $eventRecord.TimeCreated - $session.StartedAt
+                DurationMinutes = [math]::Round(($eventRecord.TimeCreated - $session.StartedAt).TotalMinutes, 2)
+                LogonType = $session.LogonType
+                Result = 'Completada'
+                FailureStatus = $null
+            })
+            $openSessions.Remove($key)
+        }
+    }
+}
+
+foreach ($key in $openSessions.Keys) {
+    $session = $openSessions[$key]
+    $machine = ($key -split '\|', 2)[0]
+    $rows.Add([pscustomobject]@{
+        User = $session.User
+        Computer = $machine
+        StartedAt = $session.StartedAt
+        EndedAt = $null
+        Duration = $Until - $session.StartedAt
+        DurationMinutes = [math]::Round(($Until - $session.StartedAt).TotalMinutes, 2)
+        LogonType = $session.LogonType
+        Result = 'Sesión posiblemente activa'
+        FailureStatus = $null
+    })
+}
+
+$result = @($rows | Where-Object {
+    (-not $UserName -or $_.User -like "*$UserName*") -and
+    (-not $ComputerName -or $_.Computer -like "*$ComputerName*")
+} | Sort-Object StartedAt -Descending)
+
+if ($OutputCsv) {
+    $resolvedOutput = [IO.Path]::GetFullPath($OutputCsv)
+    New-Item -ItemType Directory -Path (Split-Path $resolvedOutput -Parent) -Force | Out-Null
+    $result | Export-Csv -LiteralPath $resolvedOutput -NoTypeInformation -Encoding UTF8
+}
+
+$result

scripts/Initialize-SguDomainController.ps1

@@ -348,6 +348,10 @@ foreach ($requiredPath in @(
     (Join-Path $scriptsRoot 'Set-SguDomainComputerPolicies.ps1'),
     (Join-Path $scriptsRoot 'Set-SguDomainUserPolicies.ps1'),
     (Join-Path $scriptsRoot 'Enable-SguServerRemoteManagement.ps1'),
+    (Join-Path $scriptsRoot 'Install-SguDomainMonitoring.ps1'),
+    (Join-Path $scriptsRoot 'Invoke-SguMonitoringMaintenance.ps1'),
+    (Join-Path $scriptsRoot 'Get-SguUsageReport.ps1'),
+    (Join-Path $scriptsRoot 'Get-SguBrokerLog.ps1'),
     (Join-Path $brokerPublishPath 'SGU.AuthBroker.exe'))) {
     if (-not (Test-Path -LiteralPath $requiredPath -PathType Leaf)) {
         throw "The server bootstrap package is incomplete: $requiredPath"
@@ -606,8 +610,15 @@ else {
             -RemoteAddress $privateSubnet | Out-Null
 }
 
+$collectorFqdn = "$env:COMPUTERNAME.$DomainName"
 & (Join-Path $scriptsRoot 'Set-SguDomainComputerPolicies.ps1') `
-    -TargetOuDn $laboratoryOuDn -DomainController $env:COMPUTERNAME | Out-Null
+    -TargetOuDn $laboratoryOuDn `
+    -DomainController $env:COMPUTERNAME `
+    -EventCollectorFqdn $collectorFqdn | Out-Null
+& (Join-Path $scriptsRoot 'Install-SguDomainMonitoring.ps1') `
+    -CollectorFqdn $collectorFqdn `
+    -ComputerOuDn $laboratoryOuDn `
+    -RetentionDays 183 | Out-Null
 $userPolicyParameters = @{
     TargetOuDn = $usersOuDn
     DomainController = $env:COMPUTERNAME
@@ -632,6 +643,9 @@ $validation = [ordered]@{
     BrokerPortListening = [bool](Get-NetTCPConnection -LocalPort 8443 -State Listen -ErrorAction SilentlyContinue)
     WinRM = (Get-Service WinRM).Status.ToString()
     RemoteDesktop = (Get-Service TermService).Status.ToString()
+    EventCollector = (Get-Service Wecsvc).Status.ToString()
+    EventSubscription = @(& wecutil.exe enum-subscription) -contains 'SGU-Lab-Monitoring'
+    MonitoringRetentionDays = 183
     PackageShare = "\\$env:COMPUTERNAME\Packages"
     LaboratoryOu = $laboratoryOuDn
     UsersOu = $usersOuDn
@@ -643,7 +657,9 @@ $validation = [ordered]@{
 if ($validation.BrokerService -ne 'Running' -or
     -not $validation.BrokerPortListening -or
     $validation.WinRM -ne 'Running' -or
-    $validation.RemoteDesktop -ne 'Running') {
+    $validation.RemoteDesktop -ne 'Running' -or
+    $validation.EventCollector -ne 'Running' -or
+    -not $validation.EventSubscription) {
     throw 'Server finalization did not pass service validation. Review bootstrap.log and re-run the bootstrap.'
 }
 

scripts/Install-CredentialProvider.ps1

@@ -35,6 +35,8 @@ $providerRegistryPath = "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authent
 $classRegistryPath = "HKLM:\SOFTWARE\Classes\CLSID\$providerClassId\InprocServer32"
 $defaultProviderPolicyPath = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\System'
 $interactiveLogonPolicyPath = 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System'
+$accountPictureSourcePath = Join-Path $PublishPath 'branding\user.png'
+$accountPictureDirectory = Join-Path $env:ProgramData 'Microsoft\User Account Pictures'
 
 $identity = [Security.Principal.WindowsIdentity]::GetCurrent()
 $principal = [Security.Principal.WindowsPrincipal]::new($identity)
@@ -56,6 +58,70 @@ function Test-DotNet10Runtime {
     return $false
 }
 
+function Install-DefaultAccountPicture {
+    param([Parameter(Mandatory)][string]$SourcePath)
+
+    if (-not (Test-Path -LiteralPath $SourcePath -PathType Leaf)) {
+        return $false
+    }
+
+    Add-Type -AssemblyName System.Drawing
+    New-Item -ItemType Directory -Path $accountPictureDirectory -Force | Out-Null
+
+    function Save-AccountPicture {
+        param(
+            [Parameter(Mandatory)][Drawing.Image]$Image,
+            [Parameter(Mandatory)][string]$Path,
+            [Parameter(Mandatory)][Drawing.Imaging.ImageFormat]$Format
+        )
+
+        $stream = [IO.MemoryStream]::new()
+        try {
+            $Image.Save($stream, $Format)
+            [IO.File]::WriteAllBytes($Path, $stream.ToArray())
+        }
+        finally {
+            $stream.Dispose()
+        }
+    }
+
+    $source = [Drawing.Image]::FromFile($SourcePath)
+    try {
+        foreach ($size in @(192, 48, 40, 32)) {
+            $bitmap = [Drawing.Bitmap]::new($size, $size)
+            try {
+                $graphics = [Drawing.Graphics]::FromImage($bitmap)
+                try {
+                    $graphics.Clear([Drawing.Color]::Transparent)
+                    $graphics.InterpolationMode = [Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
+                    $graphics.DrawImage($source, [Drawing.Rectangle]::new(0, 0, $size, $size))
+                    Save-AccountPicture -Image $bitmap `
+                        -Path (Join-Path $accountPictureDirectory "user-$size.png") `
+                        -Format ([Drawing.Imaging.ImageFormat]::Png)
+                }
+                finally {
+                    $graphics.Dispose()
+                }
+            }
+            finally {
+                $bitmap.Dispose()
+            }
+        }
+
+        Save-AccountPicture -Image $source `
+            -Path (Join-Path $accountPictureDirectory 'user.png') `
+            -Format ([Drawing.Imaging.ImageFormat]::Png)
+        Save-AccountPicture -Image $source `
+            -Path (Join-Path $accountPictureDirectory 'user.bmp') `
+            -Format ([Drawing.Imaging.ImageFormat]::Bmp)
+    }
+    finally {
+        $source.Dispose()
+    }
+
+    return $true
+}
+
 if (-not (Test-DotNet10Runtime)) {
     if (-not $InstallDotNetRuntime) {
         throw 'Microsoft .NET 10 x64 runtime is required. Re-run with -InstallDotNetRuntime or install it first.'
@@ -166,6 +232,10 @@ if ($PSCmdlet.ShouldProcess($installPath, 'Install and register the SGU Credenti
         [IO.File]::WriteAllText($completeMarker, $packageHash, [Text.UTF8Encoding]::new($false))
     }
 
+    # The domain GPO selects the Windows default account picture. Install its
+    # branded bitmap during enrollment so no per-machine manual setup is needed.
+    Install-DefaultAccountPicture -SourcePath $accountPictureSourcePath | Out-Null
+
     New-Item -ItemType Directory -Path (Split-Path $settingsPath -Parent) -Force | Out-Null
     $settingsJson = @{
         BrokerEndpoint = $BrokerEndpoint
@@ -179,10 +249,14 @@ if ($PSCmdlet.ShouldProcess($installPath, 'Install and register the SGU Credenti
 
     $acl = Get-Acl -LiteralPath (Split-Path $settingsPath -Parent)
     $acl.SetAccessRuleProtection($true, $false)
+    # Resolve built-in identities by SID instead of localized display names.
+    # "BUILTIN\Administrators" is not resolvable on every non-English client.
+    $systemSid = [Security.Principal.SecurityIdentifier]::new('S-1-5-18')
+    $administratorsSid = [Security.Principal.SecurityIdentifier]::new('S-1-5-32-544')
     $acl.AddAccessRule([Security.AccessControl.FileSystemAccessRule]::new(
-        'SYSTEM', 'FullControl', 'ContainerInherit,ObjectInherit', 'None', 'Allow'))
+        $systemSid, 'FullControl', 'ContainerInherit,ObjectInherit', 'None', 'Allow'))
     $acl.AddAccessRule([Security.AccessControl.FileSystemAccessRule]::new(
-        'BUILTIN\Administrators', 'FullControl', 'ContainerInherit,ObjectInherit', 'None', 'Allow'))
+        $administratorsSid, 'FullControl', 'ContainerInherit,ObjectInherit', 'None', 'Allow'))
     Set-Acl -LiteralPath (Split-Path $settingsPath -Parent) -AclObject $acl
 
     New-Item -Path $classRegistryPath -Force | Out-Null

scripts/Install-SguDomainMonitoring.ps1

@@ -0,0 +1,147 @@
+#Requires -Version 5.1
+[CmdletBinding(SupportsShouldProcess)]
+param(
+    [string]$CollectorFqdn = "$env:COMPUTERNAME.$env:USERDNSDOMAIN",
+    [string]$ComputerOuDn = 'OU=Laboratorio,DC=lci,DC=lasalle,DC=mx',
+    [string]$MonitoringRoot = 'C:\ProgramData\SGU\Monitoring',
+    [ValidateRange(30, 730)]
+    [int]$RetentionDays = 183
+)
+
+$ErrorActionPreference = 'Stop'
+$subscriptionId = 'SGU-Lab-Monitoring'
+$maintenanceScriptName = 'Invoke-SguMonitoringMaintenance.ps1'
+$reportScriptName = 'Get-SguUsageReport.ps1'
+$brokerReportScriptName = 'Get-SguBrokerLog.ps1'
+
+$identity = [Security.Principal.WindowsIdentity]::GetCurrent()
+$principal = [Security.Principal.WindowsPrincipal]::new($identity)
+if (-not $principal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
+    throw 'Run this script from an elevated Windows PowerShell session on the domain event collector.'
+}
+
+Import-Module ActiveDirectory -ErrorAction Stop
+Get-ADOrganizationalUnit -Identity $ComputerOuDn -ErrorAction Stop | Out-Null
+
+foreach ($requiredScript in $maintenanceScriptName,$reportScriptName,$brokerReportScriptName) {
+    if (-not (Test-Path -LiteralPath (Join-Path $PSScriptRoot $requiredScript) -PathType Leaf)) {
+        throw "$requiredScript must be beside Install-SguDomainMonitoring.ps1."
+    }
+}
+
+if ($PSCmdlet.ShouldProcess($env:COMPUTERNAME, 'Install the SGU domain monitoring collector')) {
+    Set-Service EventLog -StartupType Automatic
+    if ((Get-Service EventLog).Status -ne 'Running') {
+        Start-Service EventLog
+    }
+    & wecutil.exe quick-config /quiet
+    if ($LASTEXITCODE -ne 0) {
+        throw "wecutil quick-config failed with exit code $LASTEXITCODE."
+    }
+    Set-Service Wecsvc -StartupType Automatic
+    Start-Service Wecsvc
+    & wevtutil.exe set-log ForwardedEvents /enabled:true /maxsize:536870912 /retention:false /autobackup:false
+    if ($LASTEXITCODE -ne 0) {
+        throw "wevtutil failed to configure ForwardedEvents with exit code $LASTEXITCODE."
+    }
+
+    $query = @'
+<QueryList>
+  <Query Id="0">
+    <Select Path="Security">*[System[(EventID=4624 or EventID=4625 or EventID=4634 or EventID=4647 or EventID=4778 or EventID=4779)]]</Select>
+    <Select Path="System">*[System[(EventID=12 or EventID=13 or EventID=41 or EventID=1074 or EventID=6005 or EventID=6006 or EventID=6008)]]</Select>
+  </Query>
+</QueryList>
+'@
+    $escapedQuery = [Security.SecurityElement]::Escape($query)
+    $subscriptionXml = @"
+<?xml version="1.0" encoding="UTF-8"?>
+<Subscription xmlns="http://schemas.microsoft.com/2006/03/windows/events/subscription">
+  <SubscriptionId>$subscriptionId</SubscriptionId>
+  <SubscriptionType>SourceInitiated</SubscriptionType>
+  <Description>SGU interactive sessions, failures, reconnects, and workstation power state.</Description>
+  <Enabled>true</Enabled>
+  <Uri>http://schemas.microsoft.com/wbem/wsman/1/windows/EventLog</Uri>
+  <ConfigurationMode>Custom</ConfigurationMode>
+  <Delivery Mode="Push">
+    <Batching><MaxItems>5</MaxItems><MaxLatencyTime>30000</MaxLatencyTime></Batching>
+    <PushSettings><Heartbeat Interval="60000"/></PushSettings>
+  </Delivery>
+  <Query>$escapedQuery</Query>
+  <ReadExistingEvents>false</ReadExistingEvents>
+  <TransportName>HTTP</TransportName>
+  <ContentFormat>Events</ContentFormat>
+  <Locale Language="es-MX"/>
+  <LogFile>ForwardedEvents</LogFile>
+  <AllowedSourceDomainComputers>O:NSG:NSD:(A;;GA;;;DC)(A;;GA;;;NS)</AllowedSourceDomainComputers>
+</Subscription>
+"@
+
+    New-Item -ItemType Directory -Path $MonitoringRoot -Force | Out-Null
+    $subscriptionPath = Join-Path $MonitoringRoot 'SGU-Lab-Monitoring.xml'
+    [IO.File]::WriteAllText($subscriptionPath, $subscriptionXml, [Text.UTF8Encoding]::new($true))
+    $existingSubscriptions = @(& wecutil.exe enum-subscription 2>$null)
+    if ($existingSubscriptions -contains $subscriptionId) {
+        & wecutil.exe delete-subscription $subscriptionId
+        if ($LASTEXITCODE -ne 0) {
+            throw "Could not replace the existing $subscriptionId subscription."
+        }
+    }
+    & wecutil.exe create-subscription $subscriptionPath
+    if ($LASTEXITCODE -ne 0) {
+        throw "Could not create the $subscriptionId subscription."
+    }
+
+    foreach ($scriptName in $maintenanceScriptName,$reportScriptName,$brokerReportScriptName) {
+        Copy-Item -LiteralPath (Join-Path $PSScriptRoot $scriptName) `
+            -Destination (Join-Path $MonitoringRoot $scriptName) -Force
+    }
+
+    $configuration = [ordered]@{
+        CollectorFqdn = $CollectorFqdn
+        ComputerOuDn = $ComputerOuDn
+        RetentionDays = $RetentionDays
+        SubscriptionId = $subscriptionId
+    }
+    [IO.File]::WriteAllText(
+        (Join-Path $MonitoringRoot 'monitoring.json'),
+        ($configuration | ConvertTo-Json),
+        [Text.UTF8Encoding]::new($false))
+
+    $powerShell = "$env:SystemRoot\System32\WindowsPowerShell\v1.0\powershell.exe"
+    $maintenanceScript = Join-Path $MonitoringRoot $maintenanceScriptName
+    $inventoryAction = New-ScheduledTaskAction -Execute $powerShell -Argument (
+        "-NoLogo -NoProfile -NonInteractive -ExecutionPolicy Bypass -File `"$maintenanceScript`" " +
+        "-MonitoringRoot `"$MonitoringRoot`" -ComputerOuDn `"$ComputerOuDn`" -RetentionDays $RetentionDays -InventoryOnly")
+    $inventoryTrigger = New-ScheduledTaskTrigger -Once -At (Get-Date).AddMinutes(1) `
+        -RepetitionInterval (New-TimeSpan -Minutes 5) `
+        -RepetitionDuration (New-TimeSpan -Days 3650)
+    $taskSettings = New-ScheduledTaskSettingsSet -StartWhenAvailable `
+        -ExecutionTimeLimit (New-TimeSpan -Minutes 10) -RestartCount 2 `
+        -RestartInterval (New-TimeSpan -Minutes 1)
+    Register-ScheduledTask -TaskName 'SGU-Monitoring-Inventory' -Action $inventoryAction `
+        -Trigger $inventoryTrigger -Settings $taskSettings -User 'SYSTEM' -RunLevel Highest -Force | Out-Null
+
+    $retentionAction = New-ScheduledTaskAction -Execute $powerShell -Argument (
+        "-NoLogo -NoProfile -NonInteractive -ExecutionPolicy Bypass -File `"$maintenanceScript`" " +
+        "-MonitoringRoot `"$MonitoringRoot`" -ComputerOuDn `"$ComputerOuDn`" -RetentionDays $RetentionDays")
+    $retentionTrigger = New-ScheduledTaskTrigger -Daily -At '12:10 AM'
+    Register-ScheduledTask -TaskName 'SGU-Monitoring-Retention' -Action $retentionAction `
+        -Trigger $retentionTrigger -Settings $taskSettings -User 'SYSTEM' -RunLevel Highest -Force | Out-Null
+
+    & $maintenanceScript -MonitoringRoot $MonitoringRoot -ComputerOuDn $ComputerOuDn `
+        -RetentionDays $RetentionDays -InventoryOnly | Out-Null
+}
+
+[pscustomobject]@{
+    Collector = $CollectorFqdn
+    CollectorService = (Get-Service Wecsvc).Status.ToString()
+    SubscriptionId = $subscriptionId
+    SubscriptionEnabled = @(& wecutil.exe enum-subscription) -contains $subscriptionId
+    RetentionDays = $RetentionDays
+    InventoryTask = (Get-ScheduledTask -TaskName 'SGU-Monitoring-Inventory').State
+    RetentionTask = (Get-ScheduledTask -TaskName 'SGU-Monitoring-Retention').State
+    MachineStatusPath = Join-Path $MonitoringRoot 'Reports\machine-status.json'
+    UsageReportCommand = "& '$MonitoringRoot\$reportScriptName'"
+    BrokerLogCommand = "& '$MonitoringRoot\$brokerReportScriptName'"
+}

scripts/Install-SguEnrollmentGuard.ps1

@@ -28,6 +28,7 @@ $enrollmentRoot = Join-Path $env:ProgramData 'SGU\Enrollment'
 $sourceScripts = @(
     'Install-CredentialProvider.ps1',
     'Enable-LabRemoteAccess.ps1',
+    'Enable-SguClientMonitoring.ps1',
     'Test-SguClientEnrollment.ps1',
     'Repair-SguClientEnrollment.ps1'
 )
@@ -71,7 +72,11 @@ if ($PSCmdlet.ShouldProcess($enrollmentRoot, 'Install the SGU enrollment repair
         $runtimeDirectory = Join-Path $enrollmentRoot 'prerequisites'
         New-Item -ItemType Directory -Path $runtimeDirectory -Force | Out-Null
         $guardRuntimeInstaller = Join-Path $runtimeDirectory (Split-Path $DotNetRuntimeInstallerPath -Leaf)
-        Copy-Item -LiteralPath $DotNetRuntimeInstallerPath -Destination $guardRuntimeInstaller -Force
+        $sourceRuntimeInstaller = [IO.Path]::GetFullPath($DotNetRuntimeInstallerPath)
+        $destinationRuntimeInstaller = [IO.Path]::GetFullPath($guardRuntimeInstaller)
+        if (-not $sourceRuntimeInstaller.Equals($destinationRuntimeInstaller, [StringComparison]::OrdinalIgnoreCase)) {
+            Copy-Item -LiteralPath $DotNetRuntimeInstallerPath -Destination $guardRuntimeInstaller -Force
+        }
     }
 
     $guardConfiguration = [ordered]@{
@@ -92,10 +97,13 @@ if ($PSCmdlet.ShouldProcess($enrollmentRoot, 'Install the SGU enrollment repair
 
     $acl = Get-Acl -LiteralPath $enrollmentRoot
     $acl.SetAccessRuleProtection($true, $false)
+    # Well-known SIDs are invariant across localized Windows installations.
+    $systemSid = [Security.Principal.SecurityIdentifier]::new('S-1-5-18')
+    $administratorsSid = [Security.Principal.SecurityIdentifier]::new('S-1-5-32-544')
     $acl.AddAccessRule([Security.AccessControl.FileSystemAccessRule]::new(
-        'SYSTEM', 'FullControl', 'ContainerInherit,ObjectInherit', 'None', 'Allow'))
+        $systemSid, 'FullControl', 'ContainerInherit,ObjectInherit', 'None', 'Allow'))
     $acl.AddAccessRule([Security.AccessControl.FileSystemAccessRule]::new(
-        'BUILTIN\Administrators', 'FullControl', 'ContainerInherit,ObjectInherit', 'None', 'Allow'))
+        $administratorsSid, 'FullControl', 'ContainerInherit,ObjectInherit', 'None', 'Allow'))
     Set-Acl -LiteralPath $enrollmentRoot -AclObject $acl
 
     $repairScript = Join-Path $enrollmentRoot 'Repair-SguClientEnrollment.ps1'

scripts/Invoke-SguMonitoringMaintenance.ps1

@@ -0,0 +1,111 @@
+#Requires -Version 5.1
+[CmdletBinding()]
+param(
+    [string]$MonitoringRoot = 'C:\ProgramData\SGU\Monitoring',
+    [string]$ComputerOuDn = 'OU=Laboratorio,DC=lci,DC=lasalle,DC=mx',
+    [ValidateRange(30, 730)]
+    [int]$RetentionDays = 183,
+    [string]$BrokerEventLogName = 'SGU Auth Broker',
+    [switch]$InventoryOnly
+)
+
+$ErrorActionPreference = 'Stop'
+Import-Module ActiveDirectory -ErrorAction Stop
+
+foreach ($serviceName in 'EventLog','Wecsvc') {
+    Set-Service -Name $serviceName -StartupType Automatic
+    if ((Get-Service $serviceName).Status -ne 'Running') {
+        Start-Service $serviceName
+    }
+}
+
+$archiveRoot = Join-Path $MonitoringRoot 'Archive'
+$brokerArchiveRoot = Join-Path $archiveRoot 'Broker'
+$reportRoot = Join-Path $MonitoringRoot 'Reports'
+New-Item -ItemType Directory -Path $archiveRoot,$brokerArchiveRoot,$reportRoot -Force | Out-Null
+
+function Test-TcpEndpoint {
+    param(
+        [Parameter(Mandatory)][string]$ComputerName,
+        [int]$Port = 5985,
+        [int]$TimeoutMilliseconds = 900
+    )
+
+    $client = [Net.Sockets.TcpClient]::new()
+    try {
+        $pending = $client.BeginConnect($ComputerName, $Port, $null, $null)
+        if (-not $pending.AsyncWaitHandle.WaitOne($TimeoutMilliseconds)) {
+            return $false
+        }
+        $client.EndConnect($pending)
+        return $true
+    }
+    catch {
+        return $false
+    }
+    finally {
+        $client.Dispose()
+    }
+}
+
+if (-not $InventoryOnly) {
+    $forwardedLog = Get-WinEvent -ListLog ForwardedEvents -ErrorAction Stop
+    if ($forwardedLog.RecordCount -gt 0) {
+        $archivePath = Join-Path $archiveRoot ("ForwardedEvents-{0:yyyyMMdd-HHmmss}.evtx" -f (Get-Date))
+        & wevtutil.exe clear-log ForwardedEvents "/backup:$archivePath"
+        if ($LASTEXITCODE -ne 0) {
+            throw "Could not archive ForwardedEvents; wevtutil returned exit code $LASTEXITCODE."
+        }
+    }
+
+    $brokerLog = Get-WinEvent -ListLog $BrokerEventLogName -ErrorAction SilentlyContinue
+    if ($brokerLog -and $brokerLog.RecordCount -gt 0) {
+        $brokerArchivePath = Join-Path $brokerArchiveRoot ("SguAuthBroker-{0:yyyyMMdd-HHmmss}.evtx" -f (Get-Date))
+        & wevtutil.exe clear-log $BrokerEventLogName "/backup:$brokerArchivePath"
+        if ($LASTEXITCODE -ne 0) {
+            throw "Could not archive $BrokerEventLogName; wevtutil returned exit code $LASTEXITCODE."
+        }
+    }
+
+    $cutoff = (Get-Date).AddDays(-$RetentionDays)
+    Get-ChildItem -LiteralPath $archiveRoot -Filter '*.evtx' -File -Recurse -ErrorAction SilentlyContinue |
+        Where-Object LastWriteTime -lt $cutoff |
+        ForEach-Object { Remove-Item -LiteralPath $_.FullName -Force }
+}
+
+$computers = @(Get-ADComputer -SearchBase $ComputerOuDn -SearchScope Subtree -Filter * `
+    -Properties DNSHostName,IPv4Address,OperatingSystem,LastLogonDate,Enabled |
+    Sort-Object Name)
+
+$inventory = @(foreach ($computer in $computers) {
+    $target = if ($computer.DNSHostName) { $computer.DNSHostName } else { $computer.Name }
+    $online = Test-TcpEndpoint -ComputerName $target
+    [pscustomobject]@{
+        ComputerName = $computer.Name
+        DNSHostName = $computer.DNSHostName
+        IPv4Address = $computer.IPv4Address
+        OperatingSystem = $computer.OperatingSystem
+        Enabled = [bool]$computer.Enabled
+        Status = if ($online) { 'Encendida' } else { 'Apagada o inaccesible' }
+        WinRMReachable = [bool]$online
+        LastDomainLogon = if ($computer.LastLogonDate) {
+            $computer.LastLogonDate.ToUniversalTime().ToString('o')
+        } else { $null }
+        CheckedAt = (Get-Date).ToUniversalTime().ToString('o')
+    }
+})
+
+$jsonPath = Join-Path $reportRoot 'machine-status.json'
+$csvPath = Join-Path $reportRoot 'machine-status.csv'
+[IO.File]::WriteAllText($jsonPath, (ConvertTo-Json -InputObject $inventory -Depth 4), [Text.UTF8Encoding]::new($false))
+$inventory | Export-Csv -LiteralPath $csvPath -NoTypeInformation -Encoding UTF8
+
+[pscustomobject]@{
+    CheckedAt = (Get-Date).ToUniversalTime().ToString('o')
+    ComputerCount = @($inventory).Count
+    OnlineCount = @($inventory | Where-Object WinRMReachable).Count
+    OfflineCount = @($inventory | Where-Object { -not $_.WinRMReachable }).Count
+    RetentionDays = $RetentionDays
+    StatusJson = $jsonPath
+    StatusCsv = $csvPath
+}

scripts/New-SguBootstrapPackages.ps1

@@ -96,6 +96,7 @@ Copy-RequiredFile -Source (Join-Path $PSScriptRoot 'Start-SguClientEnrollment.cm
     -Destination (Join-Path $clientRoot 'Start-SguClientEnrollment.cmd')
 $clientScripts = @(
     'Enable-LabRemoteAccess.ps1',
+    'Enable-SguClientMonitoring.ps1',
     'Enroll-SguDomainClient.ps1',
     'Install-CredentialProvider.ps1',
     'Install-SguEnrollmentGuard.ps1',
@@ -111,6 +112,8 @@ Copy-Item -Path (Join-Path $providerOutput '*') `
     -Destination (New-Item -ItemType Directory `
         -Path (Join-Path $clientRoot 'payload\credential-provider') -Force).FullName `
     -Recurse -Force
+Copy-RequiredFile -Source (Join-Path $repositoryRoot 'assets\branding\lasalle-mascot-account.png') `
+    -Destination (Join-Path $clientRoot 'payload\credential-provider\branding\user.png')
 Copy-RequiredFile -Source $runtimeInstaller.FullName `
     -Destination (Join-Path $clientRoot "payload\prerequisites\$($runtimeInstaller.Name)")
 Write-PackageManifest -PackageRoot $clientRoot -PackageVersion $Version -PackageKind Client
@@ -124,6 +127,10 @@ Copy-RequiredFile -Source (Join-Path $PSScriptRoot 'Start-SguServerBootstrap.cmd
 $serverScripts = @(
     'Deploy-AuthBroker.ps1',
     'Enable-SguServerRemoteManagement.ps1',
+    'Get-SguUsageReport.ps1',
+    'Get-SguBrokerLog.ps1',
+    'Install-SguDomainMonitoring.ps1',
+    'Invoke-SguMonitoringMaintenance.ps1',
     'New-LabCertificate.ps1',
     'Register-SguClientCertificate.ps1',
     'Set-LabBrokerDns.ps1',

scripts/Publish-GiteaRelease.ps1

@@ -100,6 +100,7 @@ Bootstrap reproducible para el laboratorio SGU.
 - **Advertencia:** el bootstrap de servidor crea un bosque nuevo. No restaura los SID, contraseñas ni relaciones de confianza del bosque anterior; para conservarlos se requiere una recuperación de bosque desde una copia de estado del sistema.
 - `sgu-server-bootstrap-$Version.zip`: crea el bosque AD/DNS, OUs, grupo RDP, GPO, recurso `Packages`, broker mTLS y administración remota; se reanuda solo después del reinicio.
 - `sgu-client-bootstrap-$Version.zip`: registra un certificado mTLS único, instala y valida el Credential Provider antes de unir el equipo al dominio, habilita RDP/WinRM y se repara al arranque.
+- El servidor configura WEF/WEC para registrar sesiones y fallos, inventariar el estado alcanzable de las máquinas cada cinco minutos y conservar durante 183 días tanto esos eventos como el diagnóstico estructurado del Auth Broker.
 - Windows Home se detecta y se rechaza con una explicación, ya que no admite unión a Active Directory ni RDP host.
 
 Las contraseñas se solicitan de forma interactiva y no se escriben en archivos ni en la línea de comandos. Verifique los ZIP con `SHA256SUMS-$Version.txt`.

scripts/Repair-SguClientEnrollment.ps1

@@ -9,6 +9,7 @@ $enrollmentRoot = Split-Path $ConfigurationPath -Parent
 $testScript = Join-Path $enrollmentRoot 'Test-SguClientEnrollment.ps1'
 $installScript = Join-Path $enrollmentRoot 'Install-CredentialProvider.ps1'
 $remoteAccessScript = Join-Path $enrollmentRoot 'Enable-LabRemoteAccess.ps1'
+$monitoringScript = Join-Path $enrollmentRoot 'Enable-SguClientMonitoring.ps1'
 
 $before = & $testScript
 if (-not $before.IsValid) {
@@ -32,6 +33,7 @@ if ($computer.PartOfDomain) {
     & $remoteAccessScript `
         -RemoteDesktopPrincipal ([string]$configuration.RemoteDesktopPrincipal) `
         -EnableAdministrativeFirewallGroups | Out-Null
+    & $monitoringScript | Out-Null
 }
 
 $verificationParams = @{}

scripts/Set-SguDomainComputerPolicies.ps1

@@ -2,7 +2,8 @@
 param(
     [string]$TargetOuDn = 'OU=Laboratorio,DC=lci,DC=lasalle,DC=mx',
     [string]$GpoName = 'SGU - Windows client experience',
-    [string]$DomainController = $env:COMPUTERNAME
+    [string]$DomainController = $env:COMPUTERNAME,
+    [string]$EventCollectorFqdn
 )
 
 $ErrorActionPreference = 'Stop'
@@ -24,6 +25,14 @@ if (-not $domainDn) {
     throw 'TargetOuDn does not contain a domain distinguished name.'
 }
 $domainName = ($domainDn -replace ',DC=', '.')
+if (-not $EventCollectorFqdn) {
+    $collectorComputer = Get-ADComputer -Identity $DomainController -Properties DNSHostName `
+        -Server $DomainController -ErrorAction Stop
+    $EventCollectorFqdn = $collectorComputer.DNSHostName
+}
+if (-not $EventCollectorFqdn) {
+    throw 'Could not determine the event collector FQDN.'
+}
 
 $gpo = Get-GPO -Name $GpoName -Domain $domainName -Server $DomainController -ErrorAction SilentlyContinue
 if (-not $gpo -and $PSCmdlet.ShouldProcess($GpoName, 'Create the SGU Windows client policy GPO')) {
@@ -61,15 +70,36 @@ elseif (-not $existingLinkEnabled -and
 
 $dataCollectionKey = 'HKLM\Software\Policies\Microsoft\Windows\DataCollection'
 $powerPolicyRoot = 'HKLM\Software\Policies\Microsoft\Power\PowerSettings'
+$credentialProviderPolicyKey = 'HKLM\Software\Policies\Microsoft\Windows\System'
+$interactiveLogonPolicyKey = 'HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System'
+$accountPicturePolicyKey = 'HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer'
+$eventForwardingPolicyKey = 'HKLM\Software\Policies\Microsoft\Windows\EventLog\EventForwarding\SubscriptionManager'
+$auditPolicyKey = 'HKLM\System\CurrentControlSet\Control\Lsa'
+$providerClassId = '{D789CFD8-5AD4-489F-9B83-7EB5D9D09335}'
 $policies = @(
-    @{ Key = $dataCollectionKey; Name = 'AllowTelemetry'; Value = 0 },
-    @{ Key = $dataCollectionKey; Name = 'DisableTelemetryOptInSettingsUx'; Value = 1 },
-    @{ Key = $dataCollectionKey; Name = 'DisableTelemetryOptInChangeNotification'; Value = 1 },
-    @{ Key = $dataCollectionKey; Name = 'DisableDiagnosticDataViewer'; Value = 1 },
-    @{ Key = 'HKLM\Software\Policies\Microsoft\Windows\OOBE'; Name = 'DisablePrivacyExperience'; Value = 1 },
-    @{ Key = 'HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System'; Name = 'EnableFirstLogonAnimation'; Value = 0 },
-    @{ Key = 'HKLM\Software\Policies\Microsoft\Windows\LocationAndSensors'; Name = 'DisableLocation'; Value = 1 },
-    @{ Key = 'HKLM\Software\Policies\Microsoft\Windows\AppPrivacy'; Name = 'LetAppsAccessLocation'; Value = 2 }
+    @{ Key = $dataCollectionKey; Name = 'AllowTelemetry'; Type = 'DWord'; Value = 0 },
+    @{ Key = $dataCollectionKey; Name = 'DisableTelemetryOptInSettingsUx'; Type = 'DWord'; Value = 1 },
+    @{ Key = $dataCollectionKey; Name = 'DisableTelemetryOptInChangeNotification'; Type = 'DWord'; Value = 1 },
+    @{ Key = $dataCollectionKey; Name = 'DisableDiagnosticDataViewer'; Type = 'DWord'; Value = 1 },
+    @{ Key = 'HKLM\Software\Policies\Microsoft\Windows\OOBE'; Name = 'DisablePrivacyExperience'; Type = 'DWord'; Value = 1 },
+    @{ Key = $interactiveLogonPolicyKey; Name = 'EnableFirstLogonAnimation'; Type = 'DWord'; Value = 0 },
+    @{ Key = 'HKLM\Software\Policies\Microsoft\Windows\LocationAndSensors'; Name = 'DisableLocation'; Type = 'DWord'; Value = 1 },
+    @{ Key = 'HKLM\Software\Policies\Microsoft\Windows\AppPrivacy'; Name = 'LetAppsAccessLocation'; Type = 'DWord'; Value = 2 },
+
+    # Enrollment selects the provider before domain join; this computer GPO
+    # becomes the authoritative, self-healing configuration afterwards.
+    @{ Key = $credentialProviderPolicyKey; Name = 'DefaultCredentialProvider'; Type = 'String'; Value = $providerClassId },
+    @{ Key = $credentialProviderPolicyKey; Name = 'EnumerateLocalUsers'; Type = 'DWord'; Value = 0 },
+    @{ Key = $interactiveLogonPolicyKey; Name = 'DontDisplayLastUserName'; Type = 'DWord'; Value = 1 },
+
+    # Use Windows' native default account image for named user tiles. LogonUI
+    # retains ownership of the anonymous Other user tile and its circular mask.
+    @{ Key = $accountPicturePolicyKey; Name = 'UseDefaultTile'; Type = 'DWord'; Value = 1 },
+
+    # Source-initiated Windows Event Forwarding. Kerberos authenticates domain
+    # computers to the collector; no SGU password or reusable secret is logged.
+    @{ Key = $eventForwardingPolicyKey; Name = '1'; Type = 'String'; Value = "Server=http://${EventCollectorFqdn}:5985/wsman/SubscriptionManager/WEC,Refresh=300" },
+    @{ Key = $auditPolicyKey; Name = 'SCENoApplyLegacyAuditPolicy'; Type = 'DWord'; Value = 1 }
 )
 
 $powerSettingIds = @(
@@ -80,8 +110,8 @@ $powerSettingIds = @(
 )
 foreach ($settingId in $powerSettingIds) {
     $settingKey = "$powerPolicyRoot\$settingId"
-    $policies += @{ Key = $settingKey; Name = 'ACSettingIndex'; Value = 0 }
-    $policies += @{ Key = $settingKey; Name = 'DCSettingIndex'; Value = 0 }
+    $policies += @{ Key = $settingKey; Name = 'ACSettingIndex'; Type = 'DWord'; Value = 0 }
+    $policies += @{ Key = $settingKey; Name = 'DCSettingIndex'; Type = 'DWord'; Value = 0 }
 }
 
 foreach ($policy in $policies) {
@@ -92,7 +122,7 @@ foreach ($policy in $policies) {
             -Server $DomainController `
             -Key $policy.Key `
             -ValueName $policy.Name `
-            -Type DWord `
+            -Type $policy.Type `
             -Value $policy.Value | Out-Null
     }
 }
@@ -105,7 +135,7 @@ foreach ($policy in $policies) {
         -Server $DomainController `
         -Key $policy.Key `
         -ValueName $policy.Name
-    $configuredPolicies[$policy.Name + '@' + $policy.Key] = [int]$configured.Value
+    $configuredPolicies[$policy.Name + '@' + $policy.Key] = $configured.Value
 }
 $link = @(Get-GPInheritance -Target $TargetOuDn -Domain $domainName -Server $DomainController).GpoLinks |
     Where-Object DisplayName -eq $GpoName |
@@ -120,5 +150,6 @@ $linkEnabled = $link -and (
     TargetOu = $TargetOuDn
     LinkEnabled = [bool]$linkEnabled
     PolicyCount = $configuredPolicies.Count
+    EventCollector = $EventCollectorFqdn
     Policies = [pscustomobject]$configuredPolicies
 }

scripts/Set-SguDomainUserPolicies.ps1

@@ -10,6 +10,7 @@ $ErrorActionPreference = 'Stop'
 $policyKey = 'HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System'
 $policyValueName = 'DisableLockWorkstation'
 $desktopPolicyKey = 'HKCU\Software\Policies\Microsoft\Windows\Control Panel\Desktop'
+$themeKey = 'HKCU\Software\Microsoft\Windows\CurrentVersion\Themes\Personalize'
 
 $identity = [Security.Principal.WindowsIdentity]::GetCurrent()
 $principal = [Security.Principal.WindowsPrincipal]::new($identity)
@@ -83,6 +84,19 @@ if ($PSCmdlet.ShouldProcess($GpoName, 'Prevent SGU users from manually locking w
         -Type String `
         -Value '0' | Out-Null
 
+    # Apply the native Windows dark theme at user logon. Both values are required:
+    # one controls the shell and the other controls supported applications.
+    foreach ($themeValueName in 'AppsUseLightTheme', 'SystemUsesLightTheme') {
+        Set-GPRegistryValue `
+            -Name $GpoName `
+            -Domain $domainName `
+            -Server $DomainController `
+            -Key $themeKey `
+            -ValueName $themeValueName `
+            -Type DWord `
+            -Value 0 | Out-Null
+    }
+
     if ($WallpaperPath) {
         Set-GPRegistryValue `
             -Name $GpoName `
@@ -115,6 +129,18 @@ $screenSaverValue = Get-GPRegistryValue `
     -Server $DomainController `
     -Key $desktopPolicyKey `
     -ValueName 'ScreenSaveActive'
+$appsThemeValue = Get-GPRegistryValue `
+    -Name $GpoName `
+    -Domain $domainName `
+    -Server $DomainController `
+    -Key $themeKey `
+    -ValueName 'AppsUseLightTheme'
+$systemThemeValue = Get-GPRegistryValue `
+    -Name $GpoName `
+    -Domain $domainName `
+    -Server $DomainController `
+    -Key $themeKey `
+    -ValueName 'SystemUsesLightTheme'
 $link = @(Get-GPInheritance -Target $TargetOuDn -Domain $domainName -Server $DomainController).GpoLinks |
     Where-Object DisplayName -eq $GpoName |
     Select-Object -First 1
@@ -138,5 +164,6 @@ if ($WallpaperPath) {
     LinkEnabled = [bool]$linkEnabled
     DisableLockWorkstation = [int]$configuredValue.Value
     ScreenSaverDisabled = [string]$screenSaverValue.Value -eq '0'
+    DarkMode = ([int]$appsThemeValue.Value -eq 0) -and ([int]$systemThemeValue.Value -eq 0)
     Wallpaper = $configuredWallpaper
 }

src/SGU.AuthBroker/BrokerEventIds.cs

@@ -0,0 +1,24 @@
+namespace SGU.AuthBroker;
+
+internal static class BrokerEventIds
+{
+    internal static readonly EventId BrokerStarted = new(900, nameof(BrokerStarted));
+    internal static readonly EventId AuthenticationAuthorized = new(1000, nameof(AuthenticationAuthorized));
+    internal static readonly EventId AuthenticationRejected = new(1001, nameof(AuthenticationRejected));
+    internal static readonly EventId AuthenticationUnavailable = new(1002, nameof(AuthenticationUnavailable));
+    internal static readonly EventId AuthenticationInvalidRequest = new(1003, nameof(AuthenticationInvalidRequest));
+
+    internal static readonly EventId SguAuthenticationAccepted = new(1100, nameof(SguAuthenticationAccepted));
+    internal static readonly EventId SguAuthenticationTimeout = new(1101, nameof(SguAuthenticationTimeout));
+    internal static readonly EventId SguAuthenticationNetworkFailure = new(1102, nameof(SguAuthenticationNetworkFailure));
+
+    internal static readonly EventId ProfileEnrichmentCompleted = new(1200, nameof(ProfileEnrichmentCompleted));
+    internal static readonly EventId ProfileHtmlUnexpected = new(1201, nameof(ProfileHtmlUnexpected));
+    internal static readonly EventId ProfileEnrichmentTimeout = new(1202, nameof(ProfileEnrichmentTimeout));
+    internal static readonly EventId ProfileEnrichmentFailure = new(1203, nameof(ProfileEnrichmentFailure));
+    internal static readonly EventId ProfilePageUnavailable = new(1204, nameof(ProfilePageUnavailable));
+
+    internal static readonly EventId DirectorySynchronizationFailure = new(1300, nameof(DirectorySynchronizationFailure));
+    internal static readonly EventId DirectoryOptionalMetadataFailure = new(1301, nameof(DirectoryOptionalMetadataFailure));
+    internal static readonly EventId DirectoryGroupMembershipFailure = new(1302, nameof(DirectoryGroupMembershipFailure));
+}

src/SGU.AuthBroker/Program.cs

@@ -1,7 +1,9 @@
+using System.Diagnostics;
 using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 using System.Threading.RateLimiting;
 using Microsoft.AspNetCore.Server.Kestrel.Https;
+using SGU.AuthBroker;
 using SGU.AuthBroker.Contracts;
 using SGU.AuthBroker.Core.Authentication;
 using SGU.AuthBroker.Core.Directory;
@@ -10,6 +12,16 @@ using SGU.AuthBroker.Services;
 
 WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
 builder.Host.UseWindowsService(options => options.ServiceName = "SGU Authentication Broker");
+if (builder.Configuration.GetValue("Broker:Diagnostics:UseDedicatedEventLog", false))
+{
+    builder.Logging.ClearProviders();
+    builder.Logging.AddEventLog(settings =>
+    {
+        settings.LogName = "SGU Auth Broker";
+        settings.SourceName = "SGU.AuthBroker.Operational";
+        settings.Filter = (_, level) => level >= LogLevel.Information;
+    });
+}
 
 BrokerOptions brokerOptions = builder.Configuration
     .GetSection(BrokerOptions.SectionName)
@@ -56,6 +68,12 @@ builder.Services.AddRateLimiter(options =>
 });
 
 WebApplication app = builder.Build();
+ILogger auditLogger = app.Services.GetRequiredService<ILoggerFactory>()
+    .CreateLogger("SGU.AuthBroker.Audit");
+auditLogger.LogInformation(
+    BrokerEventIds.BrokerStarted,
+    "SGU Authentication Broker started with dedicated operational diagnostics enabled={DedicatedDiagnosticsEnabled}.",
+    builder.Configuration.GetValue("Broker:Diagnostics:UseDedicatedEventLog", false));
 app.UseRateLimiter();
 app.Use(async (context, next) =>
 {
@@ -75,16 +93,58 @@ app.MapPost("/v1/authenticate", async (
 {
     if (string.IsNullOrWhiteSpace(request.Password) || request.Password.Length > 256)
     {
+        auditLogger.LogInformation(
+            BrokerEventIds.AuthenticationInvalidRequest,
+            "Authentication request rejected before validation for {InstitutionalUser}: password was missing or outside the supported length.",
+            SafeUserName(request.Clave));
         request.ReleasePasswordReference();
         return Results.BadRequest(new ErrorResponse("MISSING_PASSWORD", "La contraseña es requerida."));
     }
 
+    Stopwatch elapsed = Stopwatch.StartNew();
     try
     {
         AuthenticationFlowResult result = await workflow
             .AuthenticateAsync(request.Clave, request.Password, cancellationToken)
             .ConfigureAwait(false);
 
+        string institutionalUser = result.Identity?.UserName ?? SafeUserName(request.Clave);
+        switch (result.Outcome)
+        {
+            case AuthenticationFlowOutcome.Authorized:
+                auditLogger.LogInformation(
+                    BrokerEventIds.AuthenticationAuthorized,
+                    "Authentication completed for {InstitutionalUser} with role {Role} in {ElapsedMilliseconds} ms. AD created={Created}; moved={Moved}.",
+                    institutionalUser,
+                    result.Identity!.Role,
+                    elapsed.ElapsedMilliseconds,
+                    result.Directory!.Created,
+                    result.Directory.Moved);
+                break;
+            case AuthenticationFlowOutcome.InvalidCredentials:
+                auditLogger.LogInformation(
+                    BrokerEventIds.AuthenticationRejected,
+                    "Authentication was rejected for {InstitutionalUser} with code {ErrorCode} after {ElapsedMilliseconds} ms.",
+                    institutionalUser,
+                    result.ErrorCode,
+                    elapsed.ElapsedMilliseconds);
+                break;
+            case AuthenticationFlowOutcome.Unavailable:
+                auditLogger.LogWarning(
+                    BrokerEventIds.AuthenticationUnavailable,
+                    "Authentication was unavailable for {InstitutionalUser} with code {ErrorCode} after {ElapsedMilliseconds} ms.",
+                    institutionalUser,
+                    result.ErrorCode,
+                    elapsed.ElapsedMilliseconds);
+                break;
+            default:
+                auditLogger.LogInformation(
+                    BrokerEventIds.AuthenticationInvalidRequest,
+                    "Authentication request had an invalid institutional user format after {ElapsedMilliseconds} ms.",
+                    elapsed.ElapsedMilliseconds);
+                break;
+        }
+
         return result.Outcome switch
         {
             AuthenticationFlowOutcome.Authorized => Results.Ok(new AuthenticationResponse(
@@ -125,3 +185,11 @@ static IResult Unavailable(HttpContext context, string? errorCode)
 
 static string NormalizeThumbprint(string value) =>
     value.Replace(" ", string.Empty, StringComparison.Ordinal).ToUpperInvariant();
+
+static string SafeUserName(string? value)
+{
+    string candidate = value?.Trim().ToUpperInvariant() ?? string.Empty;
+    return candidate.Length is > 0 and <= 16 && candidate.All(char.IsAsciiLetterOrDigit)
+        ? candidate
+        : "<invalid-format>";
+}

src/SGU.AuthBroker/Services/ActiveDirectorySynchronizer.cs

@@ -7,7 +7,9 @@ using SGU.AuthBroker.Options;
 
 namespace SGU.AuthBroker.Services;
 
-public sealed class ActiveDirectorySynchronizer(BrokerOptions options) : IActiveDirectorySynchronizer
+public sealed class ActiveDirectorySynchronizer(
+    BrokerOptions options,
+    ILogger<ActiveDirectorySynchronizer> logger) : IActiveDirectorySynchronizer
 {
     private const int AccountDisabled = 0x0002;
     private const int NormalAccount = 0x0200;
@@ -28,9 +30,26 @@ public sealed class ActiveDirectorySynchronizer(BrokerOptions options) : IActive
         await gate.WaitAsync(cancellationToken).ConfigureAwait(false);
         try
         {
-            return await Task.Run(
-                () => Synchronize(identity, profile, password),
-                cancellationToken).ConfigureAwait(false);
+            try
+            {
+                return await Task.Run(
+                    () => Synchronize(identity, profile, password),
+                    cancellationToken).ConfigureAwait(false);
+            }
+            catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+            {
+                throw;
+            }
+            catch (Exception exception)
+            {
+                logger.LogError(
+                    BrokerEventIds.DirectorySynchronizationFailure,
+                    exception,
+                    "Active Directory synchronization failed for {InstitutionalUser} with role {Role}.",
+                    identity.UserName,
+                    identity.Role);
+                throw;
+            }
         }
         finally
         {
@@ -100,8 +119,8 @@ public sealed class ActiveDirectorySynchronizer(BrokerOptions options) : IActive
             user.Properties["pwdLastSet"].Value = -1;
             user.CommitChanges();
 
-            TryApplyProfile(user, identity, profile, options.DefaultCompany);
-            TryEnsureRemoteDesktopGroupMembership(user);
+            TryApplyProfile(user, identity, profile, options.DefaultCompany, logger);
+            TryEnsureRemoteDesktopGroupMembership(user, identity.UserName);
 
             return new DirectorySyncResult(
                 options.DomainNetbios,
@@ -120,7 +139,8 @@ public sealed class ActiveDirectorySynchronizer(BrokerOptions options) : IActive
         DirectoryEntry user,
         UserIdentity identity,
         InstitutionalProfile? profile,
-        string defaultCompany)
+        string defaultCompany,
+        ILogger logger)
     {
         try
         {
@@ -146,10 +166,15 @@ public sealed class ActiveDirectorySynchronizer(BrokerOptions options) : IActive
 
             user.CommitChanges();
         }
-        catch
+        catch (Exception exception)
         {
             // Metadata is intentionally best-effort. User creation, password sync,
             // and account enablement have already committed successfully.
+            logger.LogWarning(
+                BrokerEventIds.DirectoryOptionalMetadataFailure,
+                exception,
+                "Optional Active Directory profile metadata could not be committed for {InstitutionalUser}; password synchronization remains completed.",
+                identity.UserName);
             try
             {
                 user.RefreshCache();
@@ -170,7 +195,7 @@ public sealed class ActiveDirectorySynchronizer(BrokerOptions options) : IActive
         }
     }
 
-    private void TryEnsureRemoteDesktopGroupMembership(DirectoryEntry user)
+    private void TryEnsureRemoteDesktopGroupMembership(DirectoryEntry user, string institutionalUser)
     {
         if (string.IsNullOrWhiteSpace(options.RemoteDesktopGroupDn))
         {
@@ -194,10 +219,15 @@ public sealed class ActiveDirectorySynchronizer(BrokerOptions options) : IActive
                 group.CommitChanges();
             }
         }
-        catch
+        catch (Exception exception)
         {
             // Remote access is lab policy and must not invalidate a completed
             // password synchronization if the optional group is unavailable.
+            logger.LogWarning(
+                BrokerEventIds.DirectoryGroupMembershipFailure,
+                exception,
+                "Optional remote-desktop group membership could not be updated for {InstitutionalUser}; password synchronization remains completed.",
+                institutionalUser);
         }
     }
 

src/SGU.AuthBroker/Services/NtlmCredentialValidator.cs

@@ -35,6 +35,10 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
         string password,
         CancellationToken cancellationToken)
     {
+        using IDisposable? logScope = logger.BeginScope(
+            "InstitutionalUser={InstitutionalUser}; InstitutionalRole={InstitutionalRole}",
+            identity.UserName,
+            identity.Role);
         Uri authenticationUri = new(
             new Uri(options.Endpoint, UriKind.Absolute),
             options.AuthenticationPath);
@@ -155,6 +159,7 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
                     }
 
                     logger.LogInformation(
+                        BrokerEventIds.SguAuthenticationAccepted,
                         "SGU accepted credentials after an explicit NTLM challenge in {ElapsedMilliseconds} ms.",
                         elapsed.ElapsedMilliseconds);
                     return (null, continuationUri);
@@ -184,6 +189,7 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
         catch (OperationCanceledException) when (!cancellationToken.IsCancellationRequested)
         {
             logger.LogWarning(
+                BrokerEventIds.SguAuthenticationTimeout,
                 "SGU NTLM authentication timed out after {ElapsedMilliseconds} ms.",
                 elapsed.ElapsedMilliseconds);
             return (NtlmValidationResult.Unavailable("NTLM_TIMEOUT"), null);
@@ -191,6 +197,7 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
         catch (HttpRequestException exception)
         {
             logger.LogWarning(
+                BrokerEventIds.SguAuthenticationNetworkFailure,
                 exception,
                 "SGU NTLM authentication failed after {ElapsedMilliseconds} ms.",
                 elapsed.ElapsedMilliseconds);
@@ -347,6 +354,7 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
                     if (profile is null)
                     {
                         logger.LogWarning(
+                            BrokerEventIds.ProfileHtmlUnexpected,
                             "SGU returned a profile page for role {Role}, but no supported profile fields were found after {ElapsedMilliseconds} ms.",
                             identity.Role,
                             elapsed.ElapsedMilliseconds);
@@ -354,8 +362,10 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
                     else
                     {
                         logger.LogInformation(
-                            "SGU profile enrichment completed for role {Role} in {ElapsedMilliseconds} ms.",
+                            BrokerEventIds.ProfileEnrichmentCompleted,
+                            "SGU profile enrichment completed for role {Role} with {ProfileFieldCount} supported fields in {ElapsedMilliseconds} ms.",
                             identity.Role,
+                            CountProfileFields(profile),
                             elapsed.ElapsedMilliseconds);
                     }
 
@@ -382,6 +392,7 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
         catch (OperationCanceledException)
         {
             logger.LogWarning(
+                BrokerEventIds.ProfileEnrichmentTimeout,
                 "SGU profile request for role {Role} timed out after {ElapsedMilliseconds} ms.",
                 identity.Role,
                 elapsed.ElapsedMilliseconds);
@@ -389,6 +400,7 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
         catch (Exception exception)
         {
             logger.LogWarning(
+                BrokerEventIds.ProfileEnrichmentFailure,
                 exception,
                 "SGU profile enrichment failed for role {Role} after {ElapsedMilliseconds} ms.",
                 identity.Role,
@@ -423,11 +435,33 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
                     GetProfileUri(path),
                     allowedHosts,
                     timeoutToken).ConfigureAwait(false);
-                profile = profile.Overlay(html is null ? null : parser(html));
+                if (html is null)
+                {
+                    logger.LogWarning(
+                        BrokerEventIds.ProfilePageUnavailable,
+                        "Optional SGU profile page {Path} did not return usable HTML for role {Role}; preserving fields already collected.",
+                        path,
+                        role);
+                    continue;
+                }
+
+                InstitutionalProfile? pageProfile = parser(html);
+                if (pageProfile is null)
+                {
+                    logger.LogWarning(
+                        BrokerEventIds.ProfileHtmlUnexpected,
+                        "Optional SGU profile page {Path} returned HTML without its supported field IDs for role {Role}; preserving fields already collected.",
+                        path,
+                        role);
+                    continue;
+                }
+
+                profile = profile.Overlay(pageProfile);
             }
             catch (OperationCanceledException) when (!requestCancellationToken.IsCancellationRequested)
             {
                 logger.LogWarning(
+                    BrokerEventIds.ProfileEnrichmentTimeout,
                     "SGU optional staff profile enrichment for role {Role} reached its total timeout after {ElapsedMilliseconds} ms; preserving fields already collected.",
                     role,
                     elapsed.ElapsedMilliseconds);
@@ -436,6 +470,7 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
             catch (Exception exception)
             {
                 logger.LogWarning(
+                    BrokerEventIds.ProfileEnrichmentFailure,
                     exception,
                     "An optional SGU staff profile page for role {Role} failed after {ElapsedMilliseconds} ms; preserving fields already collected.",
                     role,
@@ -487,6 +522,7 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
             }
 
             logger.LogWarning(
+                BrokerEventIds.ProfilePageUnavailable,
                 "Optional SGU profile page {Path} returned HTTP {StatusCode}.",
                 requestedUri.AbsolutePath,
                 statusCode);
@@ -494,6 +530,7 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
         }
 
         logger.LogWarning(
+            BrokerEventIds.ProfilePageUnavailable,
             "Optional SGU profile page {Path} exceeded the redirect limit.",
             requestedUri.AbsolutePath);
         return null;
@@ -550,6 +587,23 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
             right.AbsolutePath.TrimEnd('/'),
             StringComparison.OrdinalIgnoreCase);
 
+    private static int CountProfileFields(InstitutionalProfile profile) =>
+        new[]
+        {
+            profile.EmployeeNumber,
+            profile.DisplayName,
+            profile.GivenName,
+            profile.Surname,
+            profile.Email,
+            profile.EmployeeType,
+            profile.JobTitle,
+            profile.Department,
+            profile.StreetAddress,
+            profile.City,
+            profile.State,
+            profile.PostalCode
+        }.Count(value => !string.IsNullOrWhiteSpace(value));
+
     private static async Task DrainResponseAsync(
         HttpResponseMessage response,
         CancellationToken cancellationToken)
@@ -604,17 +658,31 @@ public sealed class NtlmCredentialValidator : INtlmCredentialValidator
             response.Content,
             options.MaxProfileBytes,
             timeoutToken).ConfigureAwait(false);
-        return identity.Role switch
+        InstitutionalProfile? profile;
+        switch (identity.Role)
         {
-            InstitutionalRole.Administrative =>
-                SguProfileParser.ParseAdministrative(html, identity.NumericId) ??
-                SguProfileParser.ParseMenu(html),
-            InstitutionalRole.Student =>
-                SguProfileParser.ParseStudent(html, identity.NumericId) ??
-                SguProfileParser.ParseMenu(html),
-            InstitutionalRole.Professor => SguProfileParser.ParseMenu(html),
-            _ => null
-        };
+            case InstitutionalRole.Administrative:
+                profile = SguProfileParser.ParseAdministrative(html, identity.NumericId);
+                break;
+            case InstitutionalRole.Student:
+                profile = SguProfileParser.ParseStudent(html, identity.NumericId);
+                break;
+            case InstitutionalRole.Professor:
+                return SguProfileParser.ParseMenu(html);
+            default:
+                return null;
+        }
+
+        if (profile is not null)
+        {
+            return profile;
+        }
+
+        logger.LogWarning(
+            BrokerEventIds.ProfileHtmlUnexpected,
+            "The primary SGU profile HTML did not contain the supported field IDs for role {Role}; attempting the menu-name fallback.",
+            identity.Role);
+        return SguProfileParser.ParseMenu(html);
     }
 
     private static async Task<string> ReadLimitedStringAsync(

src/SGU.CredentialProvider/ProviderTileIcon.cs

@@ -1,35 +1,32 @@
 using System.Drawing;
-using System.Drawing.Drawing2D;
 using System.Drawing.Imaging;
+using System.Drawing.Drawing2D;
 
 namespace SGU.CredentialProvider;
 
 internal static class ProviderTileIcon
 {
-    public const int Size = 72;
+    // LogonUI enlarges the dedicated-tile artwork. Supply a dense source image
+    // so the mascot remains crisp at the large sign-in surface.
+    public const int Size = 256;
+    private const string MascotResourceName = "SGU.CredentialProvider.Branding.LaSalleMascot.png";
 
     public static Bitmap Create()
     {
         Bitmap bitmap = new(Size, Size, PixelFormat.Format32bppArgb);
         using Graphics graphics = Graphics.FromImage(bitmap);
-        graphics.SmoothingMode = SmoothingMode.AntiAlias;
+        graphics.CompositingQuality = CompositingQuality.HighQuality;
+        graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
         graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
         graphics.Clear(Color.Transparent);
 
-        using SolidBrush background = new(Color.FromArgb(0, 83, 155));
-        graphics.FillEllipse(background, 1, 1, Size - 2, Size - 2);
-
-        using Pen key = new(Color.White, 5.5f)
-        {
-            StartCap = LineCap.Round,
-            EndCap = LineCap.Round,
-            LineJoin = LineJoin.Round
-        };
-
-        graphics.DrawEllipse(key, 14, 14, 25, 25);
-        graphics.DrawLine(key, 35, 35, 57, 57);
-        graphics.DrawLine(key, 47, 47, 55, 39);
-        graphics.DrawLine(key, 53, 53, 61, 45);
+        using Stream sourceStream = typeof(ProviderTileIcon).Assembly.GetManifestResourceStream(MascotResourceName)
+            ?? throw new InvalidOperationException($"The branded Credential Provider logo '{MascotResourceName}' is unavailable.");
+        using Bitmap mascot = new(sourceStream);
+        using GraphicsPath circularMask = new();
+        circularMask.AddEllipse(0, 0, Size, Size);
+        graphics.SetClip(circularMask);
+        graphics.DrawImage(mascot, new Rectangle(0, 0, Size, Size));
 
         return bitmap;
     }

src/SGU.CredentialProvider/SGU.CredentialProvider.csproj

@@ -23,6 +23,11 @@
     <ProjectReference Include="..\SGU.AuthBroker.Core\SGU.AuthBroker.Core.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <EmbeddedResource Include="..\..\assets\branding\lasalle-mexico-provider.png"
+                      LogicalName="SGU.CredentialProvider.Branding.LaSalleMascot.png" />
+  </ItemGroup>
+
   <ItemGroup>
     <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleToAttribute">
       <_Parameter1>SGU.CredentialProvider.Tests</_Parameter1>

tests/SGU.CredentialProvider.Tests/ProviderTileIconTests.cs

@@ -7,7 +7,7 @@ namespace SGU.CredentialProvider.Tests;
 public sealed class ProviderTileIconTests
 {
     [Fact]
-    public void ProviderPublishesASeventyTwoPixelLogoForSignInOptions()
+    public void ProviderPublishesAHighResolutionLogoForSignInOptions()
     {
         SguCredentialProvider provider = new();
 
@@ -20,22 +20,27 @@ public sealed class ProviderTileIconTests
         Assert.Equal(0, logo.Bitmap.GetPixel(ProviderTileIcon.Size - 1, 0).A);
         Assert.Equal(0, logo.Bitmap.GetPixel(0, ProviderTileIcon.Size - 1).A);
         Assert.Equal(0, logo.Bitmap.GetPixel(ProviderTileIcon.Size - 1, ProviderTileIcon.Size - 1).A);
-        Assert.Equal(
-            Color.FromArgb(0, 83, 155).ToArgb(),
-            logo.Bitmap.GetPixel(6, ProviderTileIcon.Size / 2).ToArgb());
-        int lightPixels = 0;
+        int redPixels = 0;
+        int navyPixels = 0;
         for (int x = 0; x < logo.Bitmap.Width; x++)
         {
             for (int y = 0; y < logo.Bitmap.Height; y++)
             {
-                if (logo.Bitmap.GetPixel(x, y).GetBrightness() > 0.7f)
+                Color pixel = logo.Bitmap.GetPixel(x, y);
+                if (pixel.R > 160 && pixel.G < 100 && pixel.B < 100)
                 {
-                    lightPixels++;
+                    redPixels++;
+                }
+
+                if (pixel.B > pixel.R && pixel.B > pixel.G && pixel.R < 70)
+                {
+                    navyPixels++;
                 }
             }
         }
 
-        Assert.InRange(lightPixels, 200, 2_000);
+        Assert.InRange(redPixels, 1_000, 30_000);
+        Assert.InRange(navyPixels, 1_000, 50_000);
     }
 
     [Fact]