Acronis Not Flushing Exchange Transaction Logs
We just took over a client that is running Acronis Backup and Recovery 11.5. It appears that they have the Advanced Server for Windows License enabled. We noticed that the exchange transaction logs are not being cleared by the backups. I looked and there is a backup job that takes a full backup of the exchange server. However, they aren't using the exchange agent. Does the exchange agent need to be used so that the backups are exchange aware and purge the logs? I also noticed that in the backup logs for this server, I am seeing two warnings:
Failed to create snapshot of volume E
Failed to take a VSS snapshot.
Could either of these errors be the reason that the exchange logs are not being purged?

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Hello David,
To add to what Raphael mentioned, you can also use a regular disk backup and have the logs truncated through VSS.
In order for this to happen, enable the "VSS Full Backup" preset, as described here.
Note that VSS does have to work correctly for this to happen.
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