I have a MS Exchange 2007 server that has been up and running without issues for a couple of years now. I am migrating to Ex2010 by installing a new server and migrating mailboxes over. I have all services on one server. Both are Server 2008, the new one is R2, with all of the latest service packs.
I have moved my mailbox to the new server and I am able to send and receive. The only issue at this point is that I get a server cert error when I open Outlook. This occurs if I am on the network and when I am using Outlook Anywhere. This will go away once I move all of the mailboxes over this weekend and change DNS, etc. but I would like to start moving the users that don't work remotely starting today to get that done. Is there a way I can move mailboxes and not have them get this message?