http://blogs.technet.com/b/uc/archive/2010/12/16/email-availability-considerations.aspxKeeping your email up and running is mission critical. While other business applications can go down without much notice, when email is down for even a minute everyone in the organization notices and wants answers. As such, Exchange admins have long haden-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)