About mailbox discovery and Granular Recovery Technology (GRT)
To perform Exchange restores with Granular Recovery Technology (GRT), NetBackup obtains the Exchange mailbox information through Exchange PowerShell. To save processing time during a GRT backup, the Exchange plug-in for the NetBackup Discovery Service starts local discoveries every 24 hours. It then sends the master server a list of the databases that it has discovered. The plug-in only gathers mailbox information for the most recent Exchange backup source for the database. It does not gather information from a server when a different server was the most recent backup source. If a database has no backup history, the plug-in gathers information for that database on each server that hosts a copy of the database. When the Discovery Service does not gather mailbox information for a database, NetBackup gathers the information in the snapshot job.
If you want to reset the backup status, see the following topic:
See Displaying and resetting the backup status for a Database Availability Group (DAG).
For information on where NetBackup logs discovery and other information, see the following topic:
See Debug logs for NetBackup for Exchange backup operations.