We have an existing domain controller for the domain x.com. We wish to exchange this server for a new server. Both are running windows 2000 server. How can we set up the new DC with all of the old AD users, computers etc. We still want to use the domain name x.com. We have configured active directory on the new machin and all the users, computers, etc. have appeared however if we disconnect the old DC then the domain is no longer recognised (nobody can log on etc.). Any ideas?