You can use the information in this article to verify the version of Exchange that is running in your organization.

This article is organized in sections that correspond to the major releases of Exchange. Each section lists build numbers for each Service Pack (SP), Cumulative Update (CU), Security Update (SU), or Update Rollup (RU) of the specific Exchange release.

Links for the available downloads are also included.

Exchange Server 2019

The table in this section provides build numbers and general release dates for each version of Microsoft Exchange Server 2019.

Exchange Server VersionBuild NumberRelease DateKB & Link
Exchange Server 2019 CU9
May2-SU
15.2.858.12
15.02.0858.012
May 11, 2021KB5003435
Exchange Server 2019 CU9
Apr2-SU
15.2.858.10
15.02.0858.010
April 13, 2021KB5001779
Exchange Server 2019 CU915.2.858.5
15.02.0858.005
March 16, 2021KB4602570
Exchange Server 2019 CU8
May21SU
15.2.792.15
15.02.0792.015
May 11, 2021KB5003435
Exchange Server 2019 CU8
Apr21SU
15.2.792.13
15.02.0792.013
April 13, 2021KB5001779
Exchange Server 2019 CU8
Mar21SU
15.2.792.10
15.02.0792.010
March 2, 2021KB5000871
Exchange Server 2019 CU815.2.792.3
15.02.0792.003
December 15, 2020KB5001779
Exchange Server 2019 CU7
Mar21SU
15.2.721.13
15.02.0721.013
March 2, 2021KB5000871
Exchange Server 2019 CU715.2.721.2
15.02.0721.002
September 15, 2020KB4571787
Exchange Server 2019 CU6
Mar21SU
15.2.659.12
15.02.0659.012
March 2, 2021KB5000871

Exchange Server 2016

The table in this section provides build numbers and general release dates for each version of Microsoft Exchange Server 2016.

Exchange Server Version Build Number Release Date KB & Link
Exchange Server 2016 CU21 15.1.2308.8
15.01.2308.008
June 29, 2021 KB5003611
Exchange Server 2016 CU20 May21SU 15.1.2242.10
15.01.2242.010
May 11, 2021 KB5003435
Exchange Server 2016 CU20 Apr21SU 15.1.2242.8
15.01.2242.008
April 13, 2021 KB5001779
Exchange Server 2016 CU20 15.1.2242.4
15.01.2242.004
March 16, 2021 KB4602569
Exchange Server 2016 CU19 May21SU 15.1.2176.14
15.01.2176.014
May 11, 2021 KB5003435
Exchange Server 2016 CU19 Apr21SU 15.1.2176.12
15.01.2176.012
April 13, 2021 KB5001779
Exchange Server 2016 CU19 Mar21SU 15.2.792.3
15.02.0792.003
March 2, 2021 KB5000871
Exchange Server 2016 CU19 15.1.2176.2
15.01.2176.002
December 7, 2020 KB4588884
Exchange Server 2016 CU18 Mar21SU 15.1.2106.13
15.01.2106.013
March 2, 2021 KB5000871
Exchange Server 2016 CU18 15.1.2106.2
15.01.2106.002
September 15, 2020

KB4571788

Exchange Server 2013

The table in this section provides build numbers and general release dates for each version of Microsoft Exchange Server 2013.

Exchange Server Version Build Number Release Date KB & Link
Exchange Server 2013 CU23 May21SU 15.0.1497.18
15.00.1497.018
May 11, 2021 KB5003435
Exchange Server 2013 CU23 Apr21SU 15.0.1497.15
15.00.1497.015
April 13, 2021 KB5001779
Exchange Server 2013 CU23 Mar21SU 15.0.1497.12
15.00.1497.012
March 2, 2021 KB5000871
Exchange Server 2013 CU23 15.0.1497.2
15.00.1497.002
June 18, 2019 KB4489622
Exchange Server 2013 CU22 Mar21SU 15.0.1473.6
15.00.1473.006
March 2, 2021 KB5000871
Exchange Server 2013 CU22 15.0.1473.3
15.00.1473.003
February 12, 2019  
Exchange Server 2013 CU21 Mar21SU 15.0.1395.12
15.00.1395.012
March 2, 2021 KB5000871
Exchange Server 2013 CU21 15.0.1395.4
15.00.1395.004
June 19, 2018  
Exchange Server 2013 CU20 15.0.1367.3
15.00.1367.003
March 20, 2018  
Exchange Server 2013 CU19 15.0.1365.1
15.00.1365.001
December 19, 2017

KB4092041

Exchange Server 2010

The tables in this section provide build numbers and general release dates for each version of Microsoft Exchange Server 2010.

Exchange Server 2010 SP3 build numbers

Exchange Server Version Build Number Release Date KB & Link
Update Rollup 32 for Exchange Server 2010 SP3 14.3.513.0
14.03.0513.000
March 2, 2021 KB5000978
Update Rollup 31 for Exchange Server 2010 SP3 14.3.509.0
14.03.0509.000
December 1, 2020 KB4593467
Update Rollup 30 for Exchange Server 2010 SP3 14.3.496.0
14.03.0496.000
February 11, 2020 KB4536989