Dans cette partie nous allons voir comment utiliser la fonction Cleanup via Powershell

1 - Les Variables

La fonction "Cleanup" permet de nettoyer la base du serveur WSUS.

Il est possible de supprimer :

• Les Superseded Updates  ou mises à jour remplacées en Français
• Les Expired Updates ou mises à jour expirées en Français
• Les Obsolete Updates ou mises à jour obsolètes en Français
• Les Compress Updates ou mises à jour inutiles en Français
• Les Obsolete Computers ou les ordinateurs obsolètes en Français
• Les Unneeded ContentFiles ou Fichiers de mise jour inutiles en Français

Dans l'exemple ci-dessous les variables seront par défaut à "$False" il suffit de mettre "$True" pour valider la fonction.

    # Variables de Cleanup: 
# Decline updates that have not been approved for 30 days or more, are not currently needed by any clients, and are superseded by an aproved update. 
[Boolean]$SupersededUpdates = $false 
# Decline updates that aren't approved and have been expired my Microsoft. 
[Boolean]$ExpiredUpdates = $false 
# Delete updates that are expired and have not been approved for 30 days or more. 
[Boolean]$ObsoleteUpdates = $false 
# Delete older update revisions that have not been approved for 30 days or more. 
[Boolean]$CompressUpdates = $false 
# Delete computers that have not contacted the server in 30 days or more. 
[Boolean]$ObsoleteComputers = $True 
# Delete update files that aren't needed by updates or downstream servers. 
[Boolean]$UnneededContentFiles = $false 

2 - La commande

Une fois les variables définies, il faut indiquer le "Cleanup Scope" qui permet d'établir quels paramètres seront nettoyer, pour cela nous utiliserons la commande suivante :

$CleanupScope = New-Object Microsoft.UpdateServices.Administration.CleanupScope($supersededUpdates,$expiredUpdates,$obsoleteUpdates,$compressUpdates,$obsoleteComputers,$unneededContentFiles)

Une fois le "Cleanup Scope" définit, il ne reste plus qu'a exécuter la commande de nettoyage ci-dessous : 

($Wsus.GetCleanupManager()).PerformCleanup($CleanupScope)

Ou

$Cleanup = $Wsus.GetCleanupManager()
$Cleanup.PerformCleanup($CleanupScope)

3 - Bonus

Si vous possédez plusieurs serveurs WSUS, il est possible d'exécuter ce script (dans cet exemple nous ciblons uniquement les Ordinateurs obsolètes, remplacez les "$False" par "$True" pour valider les autres paramètres) :

# Script de Cleanup

$LogCatch = "$env:USERPROFILE\Desktop\LogCatch.txt"

# Détection des WSUS
Get-ADComputer -Filter { (Name -like "*WSUS*") -and (Enabled -eq $true)} | Select-Object -Property DNSHostName | Sort-Object -Property DNSHostName | ForEach-Object {
    $DNSHostName = $_."DNSHostName"
    
#region - Connexion au WSUS
        # Varibles de connexions
            $WsusServer = $DNSHostName
            $WsusPort = "8530"
        # Valeur max de prise en compte d'une machine (ici 30 jours sans connexion au serveur WSUS)
            $thirtydaysago = (get-date).adddays(-30)
            $DaysComputerStale = "30"

        #region - Ouverture de la connexion au serveur 
        $ErrorActionPreference = 'SilentlyContinue'
        Try {
            [void][reflection.assembly]::loadwithpartialname("microsoft.updateservices.administration")
            $Wsus = [microsoft.updateservices.administration.adminproxy]::getupdateserver($WsusServer,$false,$WsusPort)
            $Wsus.Name
            $Log = $Wsus.Name
            }
        Catch {
            Write-Warning "$($WsusServer)<$($WsusPort)>: $($_)" | Add-Content -Path $LogCatch
            $Connection = "Failed"
            $finalWorkSheet.Cells.Item($FinalExcelRow,9) = $Connection
            }
            If ($Log -eq $null){
                Try {
                    $WsusPort2 = "80"
                    [void][reflection.assembly]::loadwithpartialname("microsoft.updateservices.administration")
                    $Wsus = [microsoft.updateservices.administration.adminproxy]::getupdateserver($WsusServer,$false,$WsusPort2)
                    $Wsus.Name
                    }
                Catch {
            Write-Warning "$($WsusServer)<$($WsusPort2)>: $($_)" | Add-Content -Path $LogCatch
                        }
                }
        $ErrorActionPreference = 'SilentlyContinue'
        #endregion - Ouverture de la connexion au serveur
#endregion - Connexion au WSUS

#region - Cleanup
    # Variables de Cleanup: 
    # Decline updates that have not been approved for 30 days or more, are not currently needed by any clients, and are superseded by an aproved update. 
    [Boolean]$supersededUpdates = $false 
    # Decline updates that aren't approved and have been expired my Microsoft. 
    [Boolean]$expiredUpdates = $false 
    # Delete updates that are expired and have not been approved for 30 days or more. 
    [Boolean]$obsoleteUpdates = $false 
    # Delete older update revisions that have not been approved for 30 days or more. 
    [Boolean]$compressUpdates = $false 
    # Delete computers that have not contacted the server in 30 days or more. 
    [Boolean]$obsoleteComputers = $True 
    # Delete update files that aren't needed by updates or downstream servers. 
    [Boolean]$unneededContentFiles = $false 

    $CleanupScope = New-Object Microsoft.UpdateServices.Administration.CleanupScope($supersededUpdates,$expiredUpdates,$obsoleteUpdates,$compressUpdates,$obsoleteComputers,$unneededContentFiles) 

    ($Wsus.GetCleanupManager()).PerformCleanup($CleanupScope)

#endregion - Cleanup

#region - Release des Variables
$Name = $null
$WsusPort = $null
$Wsus = $null
$Log = $null
#endregion - Release des Variables
}

La nomenclature de mes serveurs comporte "WSUS" dans le nom, je passe donc par un "Get-Adcomputer", mais vous pouvez très bien remplacer cela par un "Import-CSV".