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 clip_image001

Update Rollup 2 for Exchange Server 2007 Service Pack 1

8.1.278.2

5/8/2008

KB948016 clip_image001[1]

Update Rollup 3 for Exchange Server 2007 Service Pack 1

8.1.291.2

7/8/2008

KB949870 clip_image001[2]

Update Rollup 4 for Exchange Server 2007 Service Pack 1

8.1.311.3

10/7/2008

KB952580 clip_image001[3]

Update Rollup 5 for Exchange Server 2007 Service Pack 1

8.1.336.1

11/20/2008

KB953467 clip_image001[4]

Update Rollup 6 for Exchange Server 2007 Service Pack 1

8.1.340.1

2/10/2009

KB959241 clip_image001[5]

Update Rollup 7 for Exchange Server 2007 Service Pack 1

8.1.359.2

3/18/2009

KB960384 clip_image001[6]

Update Rollup 8 for Exchange Server 2007 Service Pack 1

8.1.375.2

5/19/2009

KB968012 clip_image001[7]

Update Rollup 9 for Exchange Server 2007 Service Pack 1

8.1.393.1

7/17/2009

KB970162 clip_image001[8]

Update Rollup 10 for Exchange Server 2007 Service Pack 1

8.1.436.0

4/9/2010

KB981407 clip_image001[9]


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 clip_image001[10]

Update Rollup 2 for Exchange Server 2007 Service Pack 2

8.2.234.1

1/22/2010

KB972076 clip_image001[11]

Update Rollup 3 for Exchange Server 2007 Service Pack 2

8.2.247.2

3/17/2010

KB979784 clip_image001[12]

Update Rollup 4 for Exchange Server 2007 Service Pack 2

8.2.254.0

4/9/2010

KB981383 clip_image001[13]

Update Rollup 5 for Exchange Server 2007 Service Pack 2

8.2.305.3

12/7/2010

KB2407132 clip_image001[14]

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 clip_image001[15]

Update Rollup 2 for Exchange Server 2007 Service Pack 3

8.3.137.3

12/10/2010

KB2407025 clip_image001[16]

Update Rollup 3 for Exchange Server 2007 Service Pack 3

8.3.159.0

3/2/2011

KB2492691 clip_image001[17]

Update Rollup 3-v2 for Exchange Server 2007 Service Pack 3

8.3.159.2

3/30/2011

KB2530488 clip_image001[18]

Update Rollup 4 for Exchange Server 2007 Service Pack 3

8.3.192.1

7/7/2011

KB2509911 clip_image001[19]

Update Rollup 5 for Exchange Server 2007 Service Pack 3

8.3.213.1

9/21/2011

KB2602324 clip_image001[20]

Update Rollup 6 for Exchange Server 2007 Service Pack 3

8.3.245.2

1/25/2012

KB2608656 clip_image001[21]


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 clip_image001[22]

Update Rollup 2 for Exchange Server 2010

14.0.689.0

3/4/2010

KB979611 clip_image001[23]

Update Rollup 3 for Exchange Server 2010

14.0.694.0

4/9/2010

KB981401 clip_image001[24]

Update Rollup 4 for Exchange Server 2010

14.0.702.1

6/17/2010

KB982639 clip_image001[25]

Update Rollup 5 for Exchange Server 2010

14.0.726.0

12/13/2010

KB2407113 clip_image001[26]


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 clip_image001[27]

Update Rollup 2 for Exchange Server 2010 SP1

14.1.270.1

12/9/2010

KB2425179 clip_image001[28]

 

Update Rollup 3 for Exchange Server 2010 SP1

14.1.289.3

3/7/2011

KB2492690 clip_image001[29]

Update Rollup 3-v3 for Exchange Server 2010 SP1

14.1.289.7

4/1/2011

KB2529939 clip_image001[30]

Update Rollup 4 for Exchange Server 2010 SP1

14.1.323.1

6/22/2011

KB2509910 clip_image001[31]

Update Rollup 4-v2 for Exchange Server 2010 SP1

14.1.323.6

7/27/2011

KB2579150 clip_image001[32]

Update Rollup 5 for Exchange Server 2010 SP1

14.1.339.1

8/23/2011

KB2582113 clip_image001[33]

Update Rollup 6 for Exchange Server 2010 SP1

14.1.355.2

10/27/2011

KB2608646 clip_image001[34]

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 clip_image001[35]

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