Used the built in Move mailbox option in Exchange Tasks. After the move, it left a duplicate in the original store. So I right clicked the mailbox and it deleted the mailbox. But my "Keep mailbox for" setting on the mailstore was set to 30 days. I changed the setting to 0 days and after running cleanup agent on the mailstore it still won't let me deleted it.
NOTE: After running RUS it allowed me to purge the old mailbox. But still the new mailbox is not attached to the user in AD and the users AD Exchange Tasks shows "Create" as an option which leads me to believe no mailbox is attached to that account. MOVE MAILBOX stinks!! Why doesn't this work?
NOTE: In mailbox store 2, I have no options when right clicking the new mailbox to reconnect to a user. Everything is greyed out...
If I understand the situation correctly, AD is confused and the user account needs to be attached to the new mailbox that was created in the second mail store which is sitting out there not collecting mail. In the meantime the old mailstore is collecting all new mail for the mailbox.