Exchange sending out old sent email from month ago after reboot.

I have a couple of strange things happen with our exchange 2013  server. I noticed that the C: volume was getting low on free space and I didn’t see any real cause.
I was going to expand the volume size, but before I did that I need to bounce the box to finish an install of a new backup agent for my backup Exec upgrade.
After I bounced the box I noticed that the c: volume had gone from 8.5 gig free to 23.1 gig free.

First question: What may have been using up the space and why restarting would reclaim so much? I did not change the volume size yet.

Second question: I have a few users that are saying their email account is resending email that they had already sent from about a month ago after the reboot of the exchange 2013 server. Any ideas on the cause of that?
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Where are your log files poitning to? If the diskspace is taken by files starting with e000... and 1024 KB in size, these are the logfiles for your database. Running a full backup should remove themB
Brent400Author Commented:
Those files are on different volumes.  Its not a log files issue.

Simon Butler (Sembee)ConsultantCommented:
Haven't seen this for a while - but the usual cause is AV software scanning something it shouldn't be and stopping Exchange from clearing the items correctly. Reboot the server and the lock on the files is removed and the messages sent again.

Check that any AV software on the server has the correct exclusions in it.
The current list is here:


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