> I have tried to move my exchange users to a fresh exchange 2000 > organisation from exchange 5.5. Having upgraded to Active > directory from The Migration Wizard does not work between Exchange organizations. You have to use the Exmerge to accomplish that. You should not have used the ADC to connect to old organization to the new one...you should have used the Move Server Wizard to attach the old server to the new organization/server. I'd imagine that you'll have to remove the ADC, remove the mailbox association from existing users, and then use Exmerge to dump the mailboxes out of the old server and import then them into the new server. I'd strongly recommend calling Microsoft. I think $200 would be a bargain given the complexity of this situation.