If you know the list of machines (i.e. query AD), you can do something like:

Code:

$DomainString = "ComputerName"
$UserString = "ITSupport"
$GroupString = "Administrators"
$GroupObj = GetObject("WinNT://" + $DomainString + "/" + $GroupString)
$GroupObj.Add ("WinNT://" + $DomainString + "/" + $UserString)
$DomainObj = 0
$GroupObj = 0


HTH,

Kent
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