Hello, My DC (which was a Win2K box) dies on me a few months ago. I replaced the server and installed a new DC (with Win2K3) and set it up. As in the previous server I setup my DHCP services and bingo, everything is back to the way it was. Except now my users are getting a dialog box asking for their user name password and the domain when they launch Outlook. Even after they put that information in, it still sill not let them attach to the Ex2K account. The way I've gotten around this is to do a release / renew on the IP. After doing that the users can connect and everything is hunky-dorey again. Anyone have a clue as to why this may be happening? Any help would be good. Thanks in advance!