Skype for Business Server 2015 Cumulative Update List: December 2022

With the first release of an update for Skype for Business Server 2015, it is a good opportunity to publish a list of Cumulative Updates. We will try to keep it updated as soon as a new Cumulative Update is released.

Like in the previous versions, this list will include the version for the Core Components. This is because not all components are updated when we apply a Cumulative Update.

The previous lists for the Lync Server can be found in the following links:

Lync Server 2010 Cumulative Update List

Lync Server 2013 Cumulative Update List

We already made a post on how to check the component version using PowerShell:

Skype for Business Server 2015 Component Version using PowerShell

Skype for Business Server Component Version using Get-CsServerPatchVersion – Requires version 6.0.9319.102 or above)

The latest updates for Skype for Business Server 2015 and how to update each server role is described here:

Updates for Skype for Business Server 2015

Download the latest Cumulative Update for Skype for Business Server 2015

Here is the table with the list of updates:

Version Cumulative Update KB Article
6.0.9319.842 December 2022 (CU12 HF4) KB5021629
6.0.9319.634 July 2022 (CU12 HF3) KB5016714
6.0.9319.628 April 2022 (CU12 HF2) KB3061064
6.0.9319.623 February 2022 (CU12 HF1) KB5010776
6.0.9319.619 August 2021 (CU12) KB5005359
6.0.9319.606 May 2021 (SU) KB5003729
6.0.9319.601 February 2021 (SU) KB5000675
6.0.9319.598 November 2020 (CU11 HF2) KB4594637
6.0.9319.591 July 2020 (CU11 HF1) KB4564307
6.0.9319.580 May 2020 (CU11) KB4558385
6.0.9319.562 August 2019 (CU10 HF1) KB4518735
6.0.9319.559 July 2019 (CU10) KB4505401
6.0.9319.548 May 2019 (CU9) KB4487979
6.0.9319.544 March 2019 (CU8 H1) KB4494279
6.0.9319.537 January 2019 (CU8) KB4464355
6.0.9319.534 July 2018 (CU7) KB4340904
6.0.9319.516 March 2018 (CU6 HF2) KB4086059
6.0.9319.514 January 2018 (CU6 HF1) KB4074701
6.0.9319.510 December 2017 (CU6) KB4036312
6.0.9319.281 May 2017 (CU5) KB4012621
6.0.9319.277 February 2017 (CU4 HF1) KB3207506
6.0.9319.272 November 2016 (CU4) KB3199093
6.0.9319.259 June 2016 (CU3) KB3149227
6.0.9319.235 March 2016 (CU2) KB3134260
6.0.9319.102 November 2015 (CU1) KB3097645
6.0.9319.88 September 2015 KB3098601
6.0.9319.55 June 2015 KB3061059
6.0.9319.0 RTM NA

9 thoughts on “Skype for Business Server 2015 Cumulative Update List: December 2022

  1. Hello David,

    Do you know, are there any known issues for installing CU12 (Aug 2021) on SfB server 2015?
    I’ve done some research for couldn’t find much info.


  2. Hello David,

    Thanks for sharing your experience, much appreciated. Like your blogs !

    Question please.. Once I have updated CU 12 HF2 onto SfB 2015 servers (build 6.0.9319.634), do I need to run below command?

    Install-CsDatabase -Update -ConfiguredDatabases -SqlServerFqdn mySQLDatabasenamewithFullyQualifiedDomainName -Verbose

    With the current build when I run below command,

    Test-CsDatabase -ConfiguredDatabases -SqlServerFqdn “mySQLDatabasenamewithFullyQualifiedDomainName” | Select SqlServerFqdn, SqlInstanceName, DatabaseName, InstalledVersion, ExpectedVersion | ft -AutoSize

    it shows same version under “InstalledVersion” and “ExpectedVersion”. After updating CU12 HF2, not sure if “InstalledVersion” and “ExpectedVersion” will still show the same version or not. But basically, want to know whenever you apply any CU, do you require to manually run Install-CsDatabase -Update -ConfiguredDatabases -SqlServerFqdn command at the end?


    1. Hi Raj, yes in an Enterprise Pool you need to run Install-CsDatabase -Update -ConfiguredDatabases after an update just to make sure any database schema change is also updated.
      Since SfB Server 2015 is in extended support it is not expected to have major updates to the database schema.

  3. Hello Again David, how can I confirm latest update for SfB 2015 is CU12 HF2?

    Official Microsoft link only suggests, CU12 HF1, then two security updates in April 2022 and July 2022. Is there any (official) reference on MS website which suggests it is HF2?

    Package name KB number Release date
    Description of the security update for Skype for Business Server and Lync Server: July 12, 2022 KB 5016714 July 2022

    Description of the security update for Skype for Business Server: April 12, 2022 KB 5012686 April 2022

    Skype for Business Server 2015 Cumulative Update 12 Hotfix 1 KB 3061064 February 2022

    Thanks again.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.