Microsoft does have some recommendations on the size of the Exchange database that you may want to keep in mind:

"Microsoft recommends that information store databases grow no larger than 50 GB. Assuming proper maintenance, there are no operational issues with running mailbox stores larger than 50 GB; however, backup and restore times may make larger mailbox stores unsuitable for some service level agreements (SLAs)."

The article that I found with this information can be found at http://technet.microsoft.com/en-us/library/aa995715.aspx


Ashley N. Shillinger
Systems Administrator
Research Technology and Support Facility
& Great Lakes Bioenergy Research Center
Michigan State University
202-D Biochemistry Building
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On Aug 3, 2009, at 10:07 AM, Al Puzzuoli wrote:

My exchange server has begun throwing event 9690s, complaining that the
size of the database is acceded 18 GB. The article at the below URL
describes a registry setting that will increase the  size limit:
http://tinyurl.com/e2j6q

 Any reason not to do this?  I have plenty of free space on the volume.
Thanks,

Al