Microsoft Exchange - Error -3619 (Database not found) during Exchange 2003 Restore
Microsoft Exchange and SQL
If you do not want to delete the Recovery Storage Group, the following Knowledgebase article from Microsoft describes how to modify the Exchange Server registry to perform the restore without deleting the recovery group.
Retrospect will not restore the databases to the Recovery Storage Group, but will restore them back to the location they existed in at the time of backup.
Last Update: 13 February, 2012