We have a network where a user without Administrative privleges is able to join computers that he reformats on the domian. We don't know how he is doing it and need to prevent him from doing this and also need to know how he is doing this before we contact the managment. Besideds Administrator's privilages what other methods are there? Also is there anything on windows Event Logs that we can be looking for? We also noticed that his newly rebuilded computer has port 2002 open on it.