To change your Enterprise Vault directive set
Disable the Microsoft SQL Server policy type (MS-SQL-server) to protect the fingerprint, auditing, and FSA Reporting databases when you use the Enterprise-Vault policy to protect these databases. If you do not disable these policies, you can encounter issues with incremental backups.
If you use the NetBackup SQL Agent to perform a backup then it can only be restored with the NetBackup SQL Agent. Refer to the Enterprise Vault 8.0 support using NetBackup 6.5.4 white paper for more information.