Get-ChildItem C:UserDocs |
    ForEach-Object {
        if (!(Get-ADUser -Filter "sAMAccountName -eq '$($_.Name)'")) {
            "$($_.Name) does not exist and is being deleted."
            takeown /a /r /d Y /f $_.FullName
            $Acl = Get-Acl $_.FullName
            $Acl.AddAccessRule(
                (New-Object System.Security.AccessControl.FileSystemAccessRule(
                    [System.Security.Principal.WindowsIdentity]::GetCurrent().Name,
                    "FullControl",
                    "ContainerInherit, ObjectInherit",
                    "None",
                    "Allow"
                ))
            )
            (Get-Item $_.FullName).SetAccessControl($Acl)
            Remove-Item -LiteralPath $_.FullName -Force -Recurse
        }
    }