Restoring an availability group database when an availability group crosses NetBackup domains
To restore an availability group (AG) database that was backed up by an AG node in another NetBackup domain, you must first configure NetBackup for Auto Image Replication (A.I.R.). The backup must complete and be replicated to the target node(s). Once the backup is replicated, you can perform a restore on a target node in the same way as you perform any other restore of AG databases.
Note:
Replication may not occur immediately to the target AG nodes. The time it takes for replication to occur is dependent on the settings for each master server.
See Configuring SQL Server backups when an availability group crosses NetBackup domains.
See Restoring a SQL Server availability group database to a secondary replica.
See Restoring a SQL Server availability group database to the primary and the secondary replicas.