Working with backup sets : Email message backup sets (Windows) : Restoring an Email message backup set (DS-MLR)
 
Restoring an Email message backup set (DS-MLR)
Using DS-MLR, you can restore backed up email data at the individual item level to its original location.
Before you can restore email data to an alternate location, a DS-MLR service must be installed and already running on the destination email server.
You can manually select backed up email messages to restore or use filters to perform a selective restore.
NOTE:  If you encounter restore problems when using DS-MLR, it is likely related to the DS-MLR service account configuration. For details on the requirements for the DS-MLR service account, see the Client Software Installation Guide.