You can enable the Backup Exec Granular Recovery Technology (GRT) option for offhost backups of Exchange resources. When you select the GRT option for a backup, Backup Exec collects additional information for the catalog. This information lets you restore individual mailboxes, mail messages, and public folders from Information Store backups.
To configure a GRT-enabled offhost backup for Exchange resources
If you include resources that are not supported for offhost backup, check the following check box: Process logical volumes for offhost backup one at a time. This allows the job to complete with errors.