Restoring an availability database when an availability group crosses NetBackup domains
To restore an availability group 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 replicas. Once the backup is replicated, you can perform a restore on a target replica in the same way as you perform any other restore of availability group databases.
Note:
Replication may not occur immediately to the target availability group replicas.The time it takes for replication to occur is dependent on the settings for each master server.
See Protect a SQL Server availability group that crosses domains.
See Restoring a SQL Server availability database to a secondary replica.
See Restoring a SQL Server availability database to the primary and the secondary replicas.