Working with backup sets : Email message backup sets (Windows) : Restoring an Email message backup set (DS-MLR) : Specifying the restore destination
 
Specifying the restore destination
On the Select Restore Location page, select the restore destination, and then click Next.
Original location – This option is selected by default. Data will be restored to the original backup source location(s).
Alternate location – Select this option to restore data to an alternate server that you specify. Select the alternate server and the dump location and then map the Source Mailbox to the Destination Mailbox.