We have made available the information regarding the Active Directory Schema changes made by the several Exchange versions, including Exchange Server 2010 SP2, Exchange Server 2010 SP1, Exchange Server 2010, Exchange Server 2007 SP3, Exchange Server 2007 SP2, Exchange Server 2007 SP1, Exchange Server 2007, and Exchange Server 2003.

 

Download Details - Microsoft Download Center - Exchange Server Active Directory Schema Changes Reference, October 2011
http://www.microsoft.com/download/en/details.aspx?id=5401&WT.mc_id=rss_alldownloads_all

Kindest regards,

 

João Ribeiro