Being we just noticed ClamAV had stopped running is there anyway to re-scan an entire system with the latest definition. Although this is for our current issue I would love to look at a way to do this quarterly (or more often) as a virus may have gotten through as the definitions don't know about it and then a day, week, or month later the definitions now have the capability of detecting.

If this isn't available then I propose it be implemented as administrators of email it is our responsibility to be proactive for all of our users.