I have started to plan/test to move all my users from an old exchange 2000 server over to a new exchnage 2003 server. I did the domain prep and the install of 2003 went fine. I even got to move the first mailbox without problems. Login in as the user also works fine. The problem starts when i want to send a email to the moved user. It does not get trough. I can send to the other persons in the same domain though.
All my users are in the same domain (firstname.lastname@example.org). It seems like the first exchnage 2000 server doesnt know that the moved mailbox is located on the 2003 server . If i move the mailbox back to the 2000 server, then after some minutes mail starts comming in.