Move the Exchange Mailbox Store
This advanced option will move the Exchange Server mailbox store to the destination computer. The mailbox store is typically found in a subfolder under C:\Program Files\Microsoft\Exchange Server. For Exchange 2003 the mailbox store is typically found in a subfolder under C:\Program Files\Exchsrvr.
To change this option, right-click and select Advanced from the popup menu.
For more information see Moving Exchange
|U-Move for Active Directory|