I think he means Security Group, like https://technet.microsoft.com/en-us/library/dn579255(v=ws.11).aspxI had a quick squiz at the code, and you'd have to modify it to make that work. Not sure exactly, but https://github.com/osTicket/osTicket-plugins/blob/develop/auth-ldap/authentication.php#L41 or so would require something like &(memberOf={osticket_users}) check.. dunno, would need to actually install it and test it to check. Haven't. :-| If you figure it out, let us know mate.