Script to find all maintenance windows in an SCCM environment:

 PowerShell script to find all maintenance windows in an SCCM environment:

Param

(

    #Location of file in which to record this information

    [Parameter(Mandatory=$false,

                ValueFromPipelineByPropertyName=$true,

                Position=0)]

    $OutputFile = "C:\Users\LVSAlter\Documents\SCCM discovery\MaintenanceWindows.csv",

    #Site code for the SCCM instance

    [Parameter(Mandatory=$false,

                ValueFromPipelineByPropertyName=$true,

                Position=1)]

    $SiteCode = "WJP"

)

CLS

#region Connect to CM site drive

    $ProviderMachineName = 'SYCPSCCMCB01.westjet.priv'

    #region Load CM Module for PowerShell

        if((Get-Module ConfigurationManager) -eq $null) { Import-Module "$($ENV:SMS_ADMIN_UI_PATH)\..\ConfigurationManager.psd1" } # Import the ConfigurationManager.psd1 module

        if((Get-PSDrive -Name $SiteCode -PSProvider CMSite -ErrorAction SilentlyContinue) -eq $null) { # Connect to the site's drive if it is not already present

            New-PSDrive -Name $SiteCode -PSProvider CMSite -Root $ProviderMachineName

        }

    #endregion Load CM Module for PowerShell

    Set-Location "$($SiteCode):\" # Set the current location to be the site code.

#endregion Connect to CM site drive

$OutputString = "Collection Type,Collection Name,Maintenance Window Name,Maintenance Window,Description,Duration,Enabled,GMT"

Out-File -FilePath $OutputFile -InputObject $OutputString

$Collections = (Get-CMDeviceCollection).name

foreach ($Collection in $Collections) { 

    $CollectionWindows = Get-CMMaintenanceWindow -CollectionName $Collection | Select-Object -Property Name,Description,Duration,IsEnabled,IsGMT

    foreach ($Window in $CollectionWindows) {

        $OutputString = $null

        $OutputString = '"Device Collection"' + ',"' + $Collection + '","' + $CollectionWindows.Name + '","' + $Window.Description + '","' + $Window.Duration + '","' + $Window.IsEnabled + '","' + $Window.IsGMT + '"'

        Write-Output $OutputString

        Out-File -FilePath $OutputFile -InputObject $OutputString -Append

    } 

}

$Collections = (Get-CMUserCollection).name

foreach ($Collection in $Collections) { 

    $CollectionWindows = Get-CMMaintenanceWindow -CollectionName $Collection | Select-Object -Property Name,Description,Duration,IsEnabled,IsGMT

    foreach ($Window in $CollectionWindows) {

        $OutputString = $null

        $OutputString = '"User Collection"' + ',"' + $Collection + '","' + $CollectionWindows.Name + '","' + $Window.Description + '","' + $Window.Duration + '","' + $Window.IsEnabled + '","' + $Window.IsGMT + '"'

        Write-Output $OutputString

        Out-File -FilePath $OutputFile -InputObject $OutputString -Append

    } 

}