Usunięcie konta z grupy Administrators na serwerach

Active DirectoryTP 
$servers=gc E:\servers.txt

foreach ($server in $servers){
$computer = $server;
$domainUser = "msft/jon.dole";
$groupObj =[ADSI]"WinNT://$computer/Administrators,group" 
$userObj = [ADSI]"WinNT://$domainUser,user"
$groupObj.Remove($userObj.Path)
}