Specifies how replicas in the primary role are treated in the evaluation to pick the desired replica to perform a backup.
Assembly: Microsoft.SqlServer.SqlEnum (in Microsoft.SqlServer.SqlEnum.dll)
No preference is stated for backup on replicas based on its current role. Only BackupPriority and online/connected states will be considered for replica choice.
Backups occur only on the primary replica, wherever it is.
Backups occur on the secondary replicas, except when the primary replica is the only replica online.
Backups occur only on the secondary replicas. If no secondary replicas are online, backup will not be performed.
The desired replica to perform a backup is unknown.