Exchange Server 2010 Build Numbers and Release Dates

To view the build number for the version of Exchange 2010 that you’re running, run the following command in the Exchange Management Shell:

Get-ExchangeServer | fl name,edition,admindisplayversion

All versions here:

Exchange Server 2010

Product name	Build number	Date	KB
Microsoft Exchange Server 2010 RTM	14.0.639.21	11/9/2009
Update Rollup 1 for Exchange Server 2010	14.0.682.1	12/9/2009	KB976573
Update Rollup 2 for Exchange Server 2010	14.0.689.0	3/4/2010	KB979611
Update Rollup 3 for Exchange Server 2010	14.0.694.0	4/9/2010	KB981401
Update Rollup 4 for Exchange Server 2010	14.0.702.1	6/17/2010	KB982639
Update Rollup 5 for Exchange Server 2010	14.0.726.0	12/13/2010	KB2407113

Exchange Server 2010 Service Pack 1

Product name	Build number	Date	KB
Microsoft Exchange Server 2010 SP1	14.1.218.15	8/24/2010
Update Rollup 1 for Exchange Server 2010 SP1	14.1.255.2	10/4/2010	KB2407028
Update Rollup 2 for Exchange Server 2010 SP1	14.1.270.1	12/9/2010	KB2425179
Update Rollup 3 for Exchange Server 2010 SP1	14.1.289.3	3/7/2011	KB2492690
Update Rollup 3-v3 for Exchange Server 2010 SP1	14.1.289.7	4/1/2011	KB2529939
Update Rollup 4 for Exchange Server 2010 SP1	14.1.323.1	6/22/2011	KB2509910
Update Rollup 4-v2 for Exchange Server 2010 SP1	14.1.323.6	7/27/2011	KB2579150
Update Rollup 5 for Exchange Server 2010 SP1	14.1.339.1	8/23/2011	KB2582113
Update Rollup 6 for Exchange Server 2010 SP1	14.1.355.2	10/27/2011	KB2608646

Exchange Server 2010 Service Pack 2

Product name	Build number	Date	KB
Microsoft Exchange Server 2010 SP2	14.2.247.5	4/12/2011

http://social.technet.microsoft.com/wiki/contents/articles/exchange-server-and-update-rollups-builds-numbers.aspx

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