4. May 2012 13:07
...Exchange Q&A session at TEC 2012 was the question whether the upcoming release of Exchange 2013 should force companies who want to deploy the new software to upgrade their Active Directory infrastructure to a level higher than Windows 2003. Specifically, the proposal was that the deployment of Exchange 2013 within an organization should first require the Active Directory forest to run at Windows 2008 functional level on Windows 2008 R2 servers.
...continue at source