This section shows how to perform Brick-Level backup with database availability group (DAG)
Brick-Level backup for Microsoft Exchange Server is not designed to fully protect an Exchange Server, but to facilitate easy backup and fast restore of individual emails, contacts or calendars, etc. A Brick-Level restore cannot fully recover the Information Store after a disaster.
Important:
If used, a Brick-Level Backup must be utilized in conjunction with full Information Store Backup, in order to fully protect the Exchange Server.