I started out with one exchange 2003 server(A) and now I just added a second exchange 2003 server(B) to our environment. Both servers are up and running. I want to move all mailboxes from Server A to Server B. I can't decommission server A until all mailbox and public folders are moved. What I am having problem is user in Server A can't send to Server B and visa verse. Both servers can send email to the outside world. How to I make this work until all mailboxes are moved out, to ServerB?