System Requirements for Exchange 2010http://blogs.technet.com/b/uspartner_ts2team/archive/2010/05/14/system-requirements-for-exchange-2010.aspxQ: (from Shawn) Will Exchange 2010 work on Windows Server 2003 R2? A: It appears my initial guess of “No” was right: Operating system ―Microsoft Windows Server 2008 x64 Standard and Enterprise Edition with Service Pack 2 or Microsoft Windows Server 2008en-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)