I moved an office from one SBS 2003 to a new SBS 2003. Due to buggy behavior with the old server I decied not to migrate the server with a third party tool, but to just build it freash. I backed up all the users mailboxes to .PST's, removed the WKS from the old domain, joined them to the new domain, setup Outlook to use the new Exchange server and when to File --> Import/Export and imported the .PST's into the Exchange server through Outlook. Everything seemed to work file till now. Now when they click on one of the imported messages and click reply or reply all the message bounces back saying that the destination mail system is unavailable. If the click forward and put in the same users name's / e-mail address they go through. I am guessing that the message has a memory of were it came in from and when you reply to the same users thats were it trys to send it. I Named the new Domain and server a new name so as not to conflict with the old during my "Migration". Am I correct as to why we are getting this message and is there a fix for this?