About protecting a specific node in a SQL Server availability group (legacy backup policies)
This topic describes how to protect a specific node in a SQL Server availability group using a legacy SQL Server policy.
Note the following when you configure a NetBackup policy to protect a specific node in an availability group:
For this backup scenario, do not use the PREFERREDREPLICA TRUE, PRIMARY, or PREFERRED keyword in your batch files. Backups are skipped if the backup policy does not include the node that hosts the preferred replica.
Review the information on support and limitations for availability groups.