[Kazun]

Код:

$gr1 = "CN=Gr1,OU=Groups,DC=Contoso,DC=Com"
$gr2 = "CN=Gr2,OU=Groups,DC=Contoso,DC=Com"
$gr3 = "CN=Gr3,OU=Groups,DC=Contoso,DC=Com"
$gr4 = "CN=Gr3,OU=Groups,DC=Contoso,DC=Com"

Get-ADComputer -Filter {memberof -eq $gr1 -and memberof -eq $gr2 -and memberof -eq $gr3} -Properties memberof | Foreach {
	if($_.memberof -ne $gr4) {
		Add-ADGroupMember -Identity $gr4 -Members $_.DistinguishedName
	}
	$gr1,$gr2,$gr3 | Remove-ADGroupMember -Members $_.DistinguishedName -Confirm:$false
}