Active Directory backups are full backups
Any Active Directory backup is always a NetBackup full backup, whether it is a granular backup or not.
Whenever Active Directory is in a policy's list, the Active Directory portion is always fully backed up, even when the backup type is incremental, differential or cumulative. Any other items in the list may use a differential or cumulative incremental backup type as indicated. Even though a full backup is forced for an Active Directory backup, normal incremental rules are applied to the non-Active Directory items in the policy file list.