http://blogs.technet.com/b/essentialbusinessserver/archive/2010/08/17/exchange-certificate-expiration-in-ebs-2008.aspx[ Today’s post comes to us courtesy of Shawn Sullivan and Justin Crosby] ** This post has been re-written on 8/25/2011 to cover a wider range of scenarios that have been generating an increasing amount of traffic recently. The EBS 2008 Messaging Serveren-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)