[Kazun]

Код:

$users = Get-ADUser -Filter * -Properties organization
foreach($user in $users)
{
	switch($user.Organization)
	{
		"Org1" {Add-ADGroupMember -Identity Group1 -Members $user;break}
		"Org2" {Add-ADGroupMember -Identity Group2 -Members $user;break}
		"Org3" {Add-ADGroupMember -Identity Group3 -Members $user;break}
		"Org4" {Add-ADGroupMember -Identity Group4 -Members $user;break}
	}
}