I have setup a 2003 2010 mixed mode setup for testing and i have copied about 30 mailboxes over with no problem. Today i copied one of te vice presidents mailboxes over to the exchange 2010 server and its showing as a "Linked Mailbox" vs the regular "User Mailbox". We only have one forrest in the organization. The user is up and running fine right now but im wondering why its a linked and not a user mailbox like the rest of the ones i moved. any answers / comments appreciated.