GRT backups of Exchange not truncating

When we do a GRT backup of our virtual Exchange server (Windows Server 2008 Ent) through our hyper-v host (Windows Server 2012 R2) with GRT enabled this does not truncate our logs. There are no errors on the job and says it's successful.

When I check back in the log directory of exchange, all the logs from the databases still exist and have not been flushed.

I'm running Backup Exec 2014 with SP2 + HF227745

 

 

Side note; when we run a backup of the Exchange server as if it were a physical machine the logs are truncated without issue (so it leads me to believe that this is not an issue with our Exchange server)

I have a ticket out with Symantec for over 2 months now and the tech(s) that are assigned to my case don't seem to be making much leeway in steps to figure out what's wrong so I wanted to see if anyone else has experienced this issue and found a resolution?