About the Veritas VSS provider for vSphere (NetBackup for Exchange)
The Veritas VSS provider is recommended instead of the VMware VSS provider in the following cases:
You want VMware backups to truncate the logs on Exchange Server virtual machines. The Veritas VSS provider truncates logs for Exchange Server, by means of full VSS backups.
The virtual machine you want to back up is a node in an Exchange DAG. In this case, only the active copies of the database are cataloged and the log files for only those same databases are truncated.
You want to use an exclude file list for Exchange. See the following for details on how to configure an exclude file list for Exchange.
When the Veritas VSS provider is installed and NetBackup starts a virtual machine snapshot, VMware Tools calls the Veritas VSS provider to quiesce the VSS writers for a file-level consistent backup. If log truncation is enabled in the policy, the Exchange VSS writer truncates the transaction logs when the VMware snapshot is complete.
Note:
The Veritas VSS provider must be installed separately.
See Installing the Veritas VSS provider for vSphere (NetBackup for Exchange).