About SQL Server security with NetBackup legacy backup policies
NetBackup for SQL Server uses SQL Server backup and restore commands and queries the SQL master database. These operations are validated according to the security method you choose when you install SQL Server, either integrated security or standard security. Integrated security refers to the use of Windows authentication in lieu of standard SQL Server-based logons.
Note:
If you use integrated security, the Windows account you log into is used for authentication. SQL Server ignores any user ID and password that you enter in the NetBackup MS SQL Client or in a batch file.
If you use standard security, then you must supply a SQL Server-based user ID and password. Once you provide these credentials, NetBackup stores this information in the registry (the password is encrypted) under the following registry key:
HKEY_CURRENT_USER\SOFTWARE\VERITAS\NETBACKUP\NetBackup for Microsoft SQL Server\