During the GRT backup to disk of Exchange 2007 or Exchange 2010, the snapshot phase takes an extended amount of time to complete.
Looking in the System event logs of the Exchange server it is noticed that the VSS start command and stop command occur hours apart.
When non-GRT or GRT to tape is used, this delay does not occur and you can see the VSS start and stop events within minutes of each other.
A hotfix is now available for this issue in the current version(s) of the product(s) mentioned in this article. Refer to the Hotfix link under Related Documents at the end of this article to obtain the hotfix needed to resolve the issue.
Backup Exec 2010R3 Rev 5204 Service Pack 3 (TECH203157)
Backup Exec 2012 Rev 1798 Service Pack 2 (TECH203155)