In a Microsoft Exchange Server 2007 cluster environment, you use a third-party backup application to perform Volume Shadow Copy Service (VSS) Exchange backup operation. In this situation, the backup operation fails occasionally. Additionally, the following event is generated in Application log:
Additionally, you may receive the following error message on the backup application:
0xe000037b - Using the job settings, Backup Exec attempted to back up the passive copy of the Exchange database. However, the passive copy was not available after the Microsoft Volume Shadow Copy Service (VSS) snapshot was performed. Try to run the job again.