URGENT: SBS 2011 Exchange log files filling up drive in minutes!

I need some help with ideas as to why Exchange is generating hundreds of log files every minute.
The server had 0MB free on the C: drive, and come to find out, there were over 119,000 log files in the Exchange server folder (dated within the last 7 days).  These files are named like E00001D046C.log.  Oddly, the Exchange database store
is not growing in size as you'd expect.  Frantically searching for a way to free up space, I turned on circular logging and remounted the store (after freeing up enough space for it to mount!).  Almost instantly, the 119,000+ log files disappeared,
but now there are about 40 or so that are constantly being created/written/deleted, over and over and over.
This is a small 5 person office with a 4GB database store.  The 119,000 log files were taking up over 121GB.  It's nice to have that space back, but something is in a loop, constantly creating log files as fast as the system can write them.
I checked the queues...nothing.  Where else can I look to see what might be causing this?
Thanks for the help.
ps.  Windows server backup failed about the time this problem started, stating the backup drive is out of space.  It's a 2TB drive, backing up 120GB of data.  Isn't it supposed to delete old backups to make room for new?

Hi,
Regarding the current issue, please refer to the following article to see if it could help.
Exchange log disk is full, Prevention and Remedies
http://www.msexchange.org/articles-tutorials/exchange-server-2003/planning-architecture/Exchange-log-disk-full.html
If you want to disable Exchange ActiveSync feature, please refer to the following article.
Disable Exchange ActiveSync
http://technet.microsoft.com/en-us/library/bb124502(v=exchg.141).aspx
Best Regards,
Andy Qi
TechNet Subscriber Support
If you are
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    Note: Posts are provided “AS IS” without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose.
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