This solution applies to Barracuda Backup Service.
There are three likely causes for “Could not mount share” or “Could not mount first storage group” errors with your Exchange backups:
logging is enabled on the message store(s) you're attempting to backup.
Circular logging prevents the Backup Agent from being able to successfully
backup your Exchange Databases due to the log-file recycling that occurs when
this is option is enabled. To remedy this, use the System Manager, navigate to the server
in question and expand it, and right click on any applicable storage
group. Select Properties, and
ensure the Enable circular logging
checkbox(es) are unchecked.
backup product (such as NTBackup, Backupexec, etc.) is currently used on
your server and is truncating your logs. This prevents the Barracuda
Backup Service from being able to properly backup and subsequently replay
those logs in the event of a restore being required. Thus, the
attempted backup fails. Uninstalling these products or disabling the Exchange
backup portion of these products will remedy this problem and allow the
Barracuda Backup Service to begin backing up your Exchange databases.
- Ensure communication on port 5120 inbound and outbound is open on the Exchange Server. This is the port the Barracuda Backup Agent uses for communication with your local Barracuda Backup Device.