Here's  a good article that explains how to install the necessary prerequisites for all Microsoft Exchange Server 2007 Service Pack 1 (SP1) server roles on Windows Server 2008 or Windows Vista. http://technet.microsoft.com/en-us/library/bb691354...

Stumble  this week in a customer problem, he has bought a Global certificate and Outlook anywhere stopped working, this kind of certificates have a Principal name of *."whatever".com, after some test's the solution was changing a little...