Exchange Server and Update Rollups Build Numbers (en-US)

http://social.technet.microsoft.com/wiki/contents/articles/240.exchange-server-and-update-rollups-build-numbers-en-us.aspx

Great Barghav, thanks !

*New* Specific to Exchange 2013 and its Cumulative Updates:

http://social.technet.microsoft.com/wiki/contents/articles/15776.exchange-server-2013-and-cumulative-updates-cus-build-numbers.aspx 

Other links :

Exchange Server Build Numbers and Release Dates up to Exchange 2010 SP1 RU1

http://technet.microsoft.com/en-us/library/hh135098.aspx

Sam