After installing Backup Exec 2012 SP2 and Backup Exec 2010 R3 SP3, backups to disk device using the Backup Exec Agent for Microsoft Exchange agent with Granular Recovery Technology (GRT) enabled exhibit a significantly lower job rate than jobs with GRT disabled or jobs that do not include Exchange resources.
Debugging the remote agent on the Exchange server when performance degradation occurs will reveal large delays during the snapshot process, for example:
[fsys\shadow] - Informational: Opening
[fsys\shadow] - Informational: Closing
This issue has been resolved with the release of Backup Exec 2014.
Symantec Corporation has acknowledged that the above-mentioned issue is present in earlier versions of the product(s) cited at the end of this article. Symantec Corporation is committed to product quality and satisfied customers.