Note that you can only protect and unprotect user mailboxes.
Protect Exchange Online
Log into https://login.barracudanetworks.com/, and select the Cloud-to-Cloud Backup Source in the left pane.
Navigate to the Protect page from the top navigation menu, and select the Exchange data source.
Select one or more user mailboxes to protect, and click the PROTECT button.
The Protect dialog box displays. Click PROTECT NOW.
A notification displays at the bottom of the page. The user mailbox is now protected.
Unprotect Exchange Online
Log into https://login.barracudanetworks.com/, and select the Cloud-to-Cloud Backup Source in the left pane.
Navigate to the Protect page from the top navigation menu, and select the Exchange data source.
Select one or more user mailboxes to unprotect, and click the UNPROTECT button.
The Unprotect dialog box displays. Click UNPROTECT NOW.
A notification displays at the bottom of the page. The user mailbox is now unprotected.