Exchange Server
| Product name | Build number | Date |
| Microsoft Exchange Server 2003 | 6.5.6944 | 6/30/2003 |
| Microsoft Exchange Server 2003 SP1 | 6.5.7226 | 5/25/2004 |
| Microsoft Exchange Server 2003 SP2 | 6.5.7638 | 10/19/2005 |
| Microsoft Exchange Server 2007 | 8.0.685.24 | 12/9/2006 |
| Microsoft Exchange Server 2007 | 8.0.685.25 | 12/9/2006 |
| Microsoft Exchange Server 2007 SP1 | 8.1.240.6 | 11/29/2007 |
| Microsoft Exchange Server 2007 SP2 | 8.2.176.2 | 8/24/2009 |
| Microsoft Exchange Server 2007 SP3 | 8.3.083.6 | 6/20/2010 |
| Microsoft Exchange Server 2010 | 14.0.639.21 | 11/9/2009 |
| Microsoft Exchange Server 2010 SP1 | 14.1.218.15 | 8/24/2010 |
Exchange Server 2007 Service Pack 1
| Product name | Build number | Date | KB |
| Microsoft Exchange Server Exchange 2007 SP1 | 8.1.240.6 | 11/29/2007 | |
| Update Rollup 1 for Exchange Server 2007 Service Pack 1 | 8.1.263.1 | 2/28/2008 | KB945684  |
| Update Rollup 2 for Exchange Server 2007 Service Pack 1 | 8.1.278.2 | 5/8/2008 | KB948016 |
| Update Rollup 3 for Exchange Server 2007 Service Pack 1 | 8.1.291.2 | 7/8/2008 | KB949870 |
| Update Rollup 4 for Exchange Server 2007 Service Pack 1 | 8.1.311.3 | 10/7/2008 | KB952580 |
| Update Rollup 5 for Exchange Server 2007 Service Pack 1 | 8.1.336.1 | 11/20/2008 | KB953467 |
| Update Rollup 6 for Exchange Server 2007 Service Pack 1 | 8.1.340.1 | 2/10/2009 | KB959241 |
| Update Rollup 7 for Exchange Server 2007 Service Pack 1 | 8.1.359.2 | 3/18/2009 | KB960384 |
| Update Rollup 8 for Exchange Server 2007 Service Pack 1 | 8.1.375.2 | 5/19/2009 | KB968012 |
| Update Rollup 9 for Exchange Server 2007 Service Pack 1 | 8.1.393.1 | 7/17/2009 | KB970162 |
| Update Rollup 10 for Exchange Server 2007 Service Pack 1 | 8.1.436.0 | 4/9/2010 | KB981407 |
Exchange Server 2007 Service Pack 2
| Product name | Build number | Date | KB |
| Microsoft Exchange Server 2007 SP2 | 8.2.176.2 | 8/24/2009 | |
| Update Rollup 1 for Exchange Server 2007 Service Pack 2 | 8.2.217.3 | 11/19/2009 | KB971534 |
| Update Rollup 2 for Exchange Server 2007 Service Pack 2 | 8.2.234.1 | 1/22/2010 | KB972076 |
| Update Rollup 3 for Exchange Server 2007 Service Pack 2 | 8.2.247.2 | 3/17/2010 | KB979784 |
| Update Rollup 4 for Exchange Server 2007 Service Pack 2 | 8.2.254.0 | 4/9/2010 | KB981383 |
| Update Rollup 5 for Exchange Server 2007 Service Pack 2 | 8.2.305.3 | 12/7/2010 | KB2407132 |
Exchange Server 2007 Service Pack 3
| Product name | Build number | Date | KB |
| Microsoft Exchange Server 2007 SP3 | 8.3.083.6 | 6/20/2010 | |
| Update Rollup 1 for Exchange Server 2007 Service Pack 3 | 8.3.106.2 | 9/9/2010 | KB2279665 |
| Update Rollup 2 for Exchange Server 2007 Service Pack 3 | 8.3.137.3 | 12/10/2010 | KB2407025 |
| Update Rollup 3 for Exchange Server 2007 Service Pack 3 | 8.3.159.0 | 03/2/2011 | KB2492691 |
| Update Rollup 3-v2 for Exchange Server 2007 Service Pack 3 | 8.3.159.2 | 3/30/2011 | KB2530488 |
| Update Rollup 4 for Exchange Server 2007 Service Pack 3 | 8.3.192.1 | 7/7/2011 | KB2509911 |
| Update Rollup 5 for Exchange Server 2007 Service Pack 3 | 8.3.213.1 | 9/21/2011 | KB2602324 |
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 |
Source
http://social.technet.microsoft.com/wiki/contents/articles/exchange-server-and-update-rollups-builds-numbers.aspx
