This Wiki page lists the Exchange Server versions and Update Rollup's with release dates and KB respectively.
Exchange Server 2007 Service Pack 1
Exchange Server 2007 Service Pack 2
Exchange Server 2007 Service Pack 3
Exchange Server 2010
Exchange Server 2010 Service Pack 1
Exchange Server 2010 Service Pack 2
Exchange Server 2010 Service Pack 3
Exchange Server 2013
Exchange Server is moved to Wiki page Exchange Server 2013 and Cumulative Updates (CU’s) Build Numbers
Note Last Table update at 14 Feb 2012
See also KB158530 Build numbers and release dates for Exchange Server.
This Script can be used to find Exchange 2007 and Exchange 2010 build numbers in your environment. - Added by Bhargav Shukla - MSFT
Amit Tank edited Revision 140. Comment: Added Exchange 2010 SP2 UR7
Denis Dyagilev edited Revision 138. Comment: correct links
Denis Dyagilev edited Revision 137. Comment: fixed format
Denis Dyagilev edited Revision 136. Comment: added KB2873746 (Description of Update Rollup 11 for Exchange Server 2007 SP3)
Arman Obosyan edited Revision 135. Comment: Add Update Rollup 1 for Exchange Server 2010 Service Pack 3 (KB2803727)
Carsten Siemens edited Revision 134. Comment: Fixed misspellings
Richard Mueller edited Revision 132. Comment: Replace RGB values with color names in HTML to restore colors
MaxMVP edited Revision 130. Comment: CU1 added
MaxMVP edited Revision 131. Comment: Ups.
Richard Mueller edited Revision 129. Comment: Added tags