Microsoft Exchange Server Version/Build Nubmers

This handy table has the version numbers for Exchange's different versions, service packs, and update rollups. Very handy.

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

Here's a quick summary...

Microsoft Exchange Server 20036.5.6944233
Microsoft Exchange Server 2003 SP1 6.5.7226
Microsoft Exchange Server 2003 SP2 6.5.7638
Microsoft Exchange Server 20078.0.685.24
Microsoft Exchange Server 20078.0.685.25
Microsoft Exchange Server 2007 SP1 8.1.240.6
Microsoft Exchange Server 2007 SP2 8.2.176.2
Microsoft Exchange Server 2007 SP3 8.3.083.6
Microsoft Exchange Server 2010 14.0.639.21
Microsoft Exchange Server 2010 SP1  14.1.218.15
Microsoft Exchange Server 2010 SP2 14.2.247.5
Microsoft Exchange Server 2010 SP3 14.3.123.4
Microsoft Exchange Server 201315.0.516.32