You can use the following tables to determine which Exchange Version You have
Exchange Server Release dates
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
|
Microsoft Exchange Server 2010 SP2
|
14.2.247.5
|
12/4/2011
|
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
|
3/2/2011
|
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
|
Update Rollup 6 for Exchange Server 2007 Service Pack 3
|
8.3.245.2
|
1/25/2012
|
KB2608656
|
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
|
12/4/2011
|
|
Update Rollup 1 for Exchange Server 2010 SP2
|
14.2.283.3
|
2/13/2012
|
KB2645995
|