http://blogs.technet.com/brettjo/archive/2009/05/01/exchange-2007-poc-in-a-box.aspxI came across this earlier which is pretty neat enabling non-Exchange customer to trial and test very easily…. Also include OCS R2 too. :) http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=4d1e4eca-0a59-4208-83d0-43b812bf0cden-GBCommunityServer 2.1 SP1 (Build: 61025.2)