The following requirements exist if you want to truncate logs with a VMware backup that protects SQL Server:

• To create a full backup, you must install the Veritas VSS provider. The VMware VSS provider creates copy-only backups, which cannot be used as a basis to truncate logs.

  See Installing the Veritas VSS provider for vSphere.

• For SQL Server 2012 and later, the account that runs the Microsoft SQL Server Service must have full permissions for the NetBackup Legacy Network Service temp directory. This directory is C:\Users\user\AppData\Local\Temp. User is the account that runs the NetBackup Legacy Network Service.

• To truncate logs, you must first perform a full VMware backup without log truncation. Without this initial full backup, the ASC job fails. When this backup is complete, then enable log truncation in the policy.