Has anyone seen this problem before? I am running a winnt 4.0/exchange 5.5 network. All of a sudden whenever I try to add a new exchange server to the existing site, the setup locks up when it starts replicating the local site with the new server. This of course is a problem, because if we were to lose a server, we would not be able to add one to replace it. There are no errors in the event logs, and not doctor watson's. If anyone could please send some guidance in my direction, I would appreciate. Thank you. Mary