Updates for Skype for Business Server 2015

This article specifies the applicability of Microsoft Skype for Business Server 2015 updates for each server role.

Improvements and fixes in the May 2021 update

This cumulative update includes a defense in depth fix and enables Location-Based Routing to support the Skype for Business mobile clients. It also contains the following security fixes:

  • 5003729 Description of the security update for Skype for Business Server and Lync Server: May 11, 2021 (KB5003729)

Known issues

After you install the January 2019 cumulative update 6.0.9319.537 (CU8) for Microsoft Skype for Business Server 2015, the Unified Communications Web API (UCWA) applications, such as Skype for Business on Mac, a web application for UCWA, and Skype for Business mobile clients, can’t make a call or join a meeting. For more information, see the following article:

UCWA client cannot make a call or join a meeting after installing Skype for Business Server update 6.0.9319.537

Get the updates that are released for Skype for Business Server 2015

  • 4603032 February 2021 cumulative update 6.0.9319.601 for Skype for Business Server 2015, Core Components

  • 4603033 February 2021 cumulative update 6.0.9319.601 for Skype for Business Server 2015, Web Components Server

  • 4594637 November 2020 cumulative update 6.0.9319.598 for Skype for Business Server 2015, Core Components

  • 4594638 November 2020 cumulative update 6.0.9319.598 for Skype for Business Server 2015, Web Components Server

  • 4494279 Fix for Skype for Business 2015 and Lync Server 2013 spoofing vulnerability

  • 4558386 May 2020 cumulative update 6.0.9319.580 for Skype for Business Server 2015 and Unified Communications Managed API 5.0 Runtime

  • 4558385 May 2020 cumulative update 6.0.9319.580 for Skype for Business Server 2015, Front End Server and Edge Server

  • 4558390 May 2020 cumulative update 6.0.9319.580 for Skype for Business Server 2015, Mediation Server

  • 4558389 May 2020 cumulative update 6.0.9319.580 for Skype for Business Server 2015, Conferencing Server

  • 4558388 May 2020 cumulative update 6.0.9319.580 for Skype for Business Server 2015, Response Group Service

  • 4505406 July 2019 cumulative update 6.0.9319.559 for Skype for Business Server 2015, Enterprise Web App

  • 4487983 May 2019 cumulative update 6.0.9319.548 for Skype for Business Server 2015, Persistent Chat Server

  • 4340913 July 2018 cumulative update 6.0.9319.534 for Skype for Business Server 2015, Conferencing Attendant

  • 4340905 July 2018 cumulative update 6.0.9319.534 for Skype for Business Server 2015, Call Park service

  • 4036315 December 2017 cumulative update 6.0.9319.510 for Skype for Business Server 2015, Video Interop Server

  • 4036318 December 2017 cumulative update 6.0.9319.510 for Skype for Business Server 2015, Web Conferencing Server

  • 4012658 May 2017 cumulative update 6.0.9319.281 for Skype for Business Server 2015, Bandwidth Policy Service

  • 4012656 May 2017 cumulative update 6.0.9319.281 for Skype for Business Server 2015, Conferencing Announcement

  • 3149231 June 2016 cumulative update 6.0.9319.259 for Skype for Business Server 2015, performance counters

  • 3137160 June 2016 cumulative update 6.0.9319.259 for Skype for Business Server 2015, Busy Options

  • 3124205 November 2015 cumulative update 6.0.9319.102 for Skype for Business Server 2015, Group Call Pickup

  • 3092727 November 2015 cumulative update 6.0.9319.102 for Skype for Business Server 2015, Shared Line Appearance

Uninstallation methods

Uninstall the cumulative updates

Remove cumulative updates from an Enterprise Edition pool that has two front-end servers

To do this, follow these steps:

  1. Stop new connections to other front-end servers by running the following command on both front-end servers: Stop-CsWindowsService -ComputerName <Computer.FQDN>

  2. Uninstall any cumulative updates.

  3. Restart the server, and make sure that both front-end servers are accepting new connections.

  4. After both front-end servers are updated, you must run the following command: Reset-CsPoolRegistrarState -ResetType FullReset Then, run the following command: Start-CsPool -PoolFqdn <Pool.FQDN>


Remove cumulative updates from an Enterprise Edition pool that has at least three front-end servers

To do this, follow these steps:
 

  1. Obtain the list of the upgrade domains for the Enterprise Edition pool that is associated with a front-end server. To do this, run the Get-CsPoolUpgradeReadinessState cmdlet on the front-end server.

  2. Uninstall any cumulative updates for each upgrade domain.

    Notes

    • You must uninstall cumulative updates from one upgrade domain at a time.

    • You can remove cumulative updates in parallel from all servers that are in the same upgrade domain.


    To uninstall all servers that are in the same upgrade domain, follow these steps:

    1. Run the following command: Invoke-CsComputerFailover -ComputerName <Computer.FQDN>

    2. Uninstall cumulative updates on front-end servers that are associated with an upgrade domain.

    3. Run the following command: Invoke-CsComputerFailback -ComputerName <Computer.FQDN>

    Note You must repeat step 2 to uninstall cumulative updates from every upgrade domain until all upgrade domains in the pool are updated.

You must perform several configuration operations, depending on the kind of Skype for Business 2015 Enterprise Edition back-end servers that you are using.

Note If database mirroring is enabled for the back-end databases, we strongly recommend that you use the Invoke-CsDatabaseFailover -NewPrincipal Primary command, and then run the Get-CsDatabaseMirrorState -PoolFqdn <fqdn of pool> cmdlet to verify that the primary server is principal for all databases before you run the Install-CsDatabase cmdlet. If Persistent Chat is collocated (the Persistent Chat front-end service and back-end database are running on the same server), you must run the Install-CsDatabase cmdlet together with the ExcludeCollocatedStores parameter.


Skype for Business Server 2015 Monitoring Databases

If Skype for Business Monitoring databases are deployed on stand-alone SQL databases, run the following command:

Install-CsDatabase -ConfiguredDatabases -SqlServerFqdn 
<FEBE.FQDN>
-Verbose 

In this command, <FEBE.FQDN> is a placeholder for the actual value.

Skype for Business Server 2015 Standard Edition and other roles

  1. Uninstall cumulative updates on the Standard Edition or any other server role.

  2. Restart the server if it is required to do this after you uninstall these updates.

List of server roles and the updates that apply to them

Skype for Business Server 2015 - Standard Edition server

  • Update for Bandwidth Policy Service: KB 4012658

  • Update for Conferencing Announcement: KB 4012656

  • Update for Core Components: KB 4594637

  • Update for Unified Communications Managed API 5.0, Core Runtime 64-bit: KB 4558386

  • Update for Front End Server and Edge Server (Standard or Enterprise edition server): KB 4558385

  • Update for Conferencing Server: KB 4558389

  • Update for Web Components Server: KB 4594638

  • Update for Web Conferencing Server: KB 4036318

  • Update for Mediation Server: KB 4558390

  • Update for Call Park Service: KB 4340905

  • Update for Central Management Server: KB 3036869

  • Update for Bandwidth Policy Service: KB 3010320

  • Update for Response Group Service: KB 4558388

  • Update for performance counters: KB 3149231

  • Update for Enterprise Web App: KB 4505406

  • Update for Conferencing Attendant: KB 4340913

  • Update for Video Interop Server: KB 4036315

  • Update for Busy Options: KB 3137160

Skype for Business Server 2015 - Enterprise Edition - Front End server and Back End server

  • Update for Bandwidth Policy Service: KB 4012658

  • Update for Conferencing Announcement: KB 4012656

  • Update for Core Components: KB 4594637

  • Update for Unified Communications Managed API 5.0, Core Runtime 64-bit: KB 4558386

  • Update for Front End server and Edge server (Standard or Enterprise edition server): KB 4558385

  • Update for Web Components Server: KB 4594638

  • Update for Response Group Service: KB 4558388

  • Update for Skype for Business Web Application: KB 3061058

  • Update for performance counters: KB 3149231

  • Update for Enterprise Web App: KB 4505406

  • Update for Conferencing Attendant: KB 4340913

  • Update for Conferencing Server: KB 4558389

  • Update for Video Interop Server: KB 4036315

  • Update for Busy Options: KB 3137160

Skype for Business Server 2015 - Edge server

  • Update for Core Components: KB 4594637

  • Update for Unified Communications Managed API 5.0, Core Runtime 64-bit: KB 4558386

  • Update for Front End server and Edge server (Standard or Enterprise edition server): KB 4558385

Skype for Business Server 2015 - stand-alone Mediation server

  • Update for Core Components: KB 4594637

  • Update for Unified Communications Managed API 5.0, Core Runtime 64-bit: KB 4558386

Skype for Business Server 2015 - Director server

  • Update for Core Components: KB 4594637

  • Update for Unified Communications Managed API 5.0, Core Runtime 64-bit: KB 4558386

  • Update for Front End server and Edge server (Standard or Enterprise edition server): KB 4558385

  • Update for Web Components server: KB 4594638

Skype for Business Server 2015 - Persistent Chat Front End server

  • Update for Core Components: KB 4594637

  • Update for Unified Communications Managed API 5.0, Core Runtime 64-bit: KB 4558386

Skype for Business Server 2015 - Administration Tools

  • Update for Core Components: KB 4594637

  • Update for Unified Communications Managed API 5.0, Core Runtime 64-bit: KB 4558386

Skype for Business Server 2015 - Video Interop server

  • Update for Core Components: KB 4594637

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