To make a complete Enterprise Vault system backup, you must back up all the following system databases if you have them:
The EnterpriseVaultAudit
and EnterpriseVaultFSAReporting
databases are present
only if you have configured Enterprise Vault's auditing and FSA
reporting features.
The following document on the Symantec support web site describes procedures which you can use to back up your Enterprise Vault SQL databases if you do not use a third party SQL backup tool:
http://entsupport.symantec.com/docs/322715