Find and manage updates for Skype for Business Server 2019, Skype for Business Server 2015, Lync Server 2013, and Lync Server 2010 in one place. Use the links on this page to get more information about updates, and then download the updates.
For the latest Skype for Business Online and Microsoft 365 updates, see the Microsoft 365 Roadmap.
Skype for Business Server 2019 update history
KB 4470124 is the master KB for Skype for Business Server 2019. It contains historical data about all the cumulative updates and hotfixes that have been released for this product.
| Package name |
KB number |
Release date |
| Skype for Business Server 2019 Cumulative Update 8, Hotfix 1 |
KB 4470124 |
March 2025 |
| Skype for Business Server 2019 Cumulative Update 8 |
KB 4470124 |
December 2024 |
| Description of the security update for Skype for Business Server: October 10, 2023 |
KB 5032429 |
October 2023 |
| Skype for Business Server 2019 Cumulative Update 7, Hotfix 1 |
KB 4470124 |
July 2023 |
| Skype for Business Server 2019 Cumulative Update 7 |
KB 4470124 |
June 2023 |
| Skype for Business Server 2019 Cumulative Update 6, Hotfix 3 |
KB 4470124 |
October 2022 |
| 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 2019 Cumulative Update 6 |
KB 4470124 |
December 2021 |
| Skype for Business Server 2019 Cumulative Update 5 |
KB 4470124 (MACP3) |
March 2021 |
| Skype for Business Server 2019 Cumulative Update 4, Hotfix 1 |
KB 4470124 |
November 2020 |
| Skype for Business Server 2019 Cumulative Update 4 |
KB 4470124 |
September 2020 |
| Skype for Business Server 2019 Cumulative Update 3, Hotfix 1 |
KB 4470124 |
July 2020 |
| Skype for Business Server 2019 Cumulative Update 3 |
KB 4470124 |
March 2020 |
| Skype for Business Server 2019 Cumulative Update 2 |
KB 4470124 |
December 2019 |
| Skype for Business Server 2019 Cumulative Update 1, Hotfix 1 |
KB 4470124 |
September 2019 |
| Skype for Business Server 2019 Cumulative Update 1 |
KB 4470124 |
July 2019 |
Skype for Business Server 2015 update history
KB 3061064 is the master KB for Skype for Business Server 2015. It contains historical data about all the cumulative updates and hotfixes that have been released for this product.
| Package name |
KB number |
Release date |
| Description of the security update for Skype for Business Server: October 10, 2023 |
KB 5032429 |
October 2023 |
| Skype for Business Server 2015 Cumulative Update 13 |
KB 3061064 |
August 2023 |
| Skype for Business Server 2015 Cumulative Update 12, Hotfix 4 |
KB 3061064 |
December 2022 |
| 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 13 |
KB 3061064 |
August 2023 |
| Skype for Business Server 2015 Cumulative Update 12 Hotfix 1 |
KB 3061064 |
February 2022 |
| Skype for Business Server 2015 Cumulative Update 12 |
KB 3061064 |
August 2021 |
| Skype for Business Server 2015 Cumulative Update 11, Hotfix 2 |
KB 3061064 |
November 2020 |
| Skype for Business Server 2015 Cumulative Update 11, Hotfix 1 |
KB 3061064 |
July 2020 |
| Skype for Business Server 2015 Cumulative Update 11 |
KB 3061064 |
May 13, 2020 |
| Skype for Business Server 2015 Cumulative Update 10, Hotfix 1 |
KB 3061064 |
August 2019 |
| Skype for Business Server 2015 Cumulative Update 10 |
KB 3061064 |
July 2019 |
| Cumulative update 9 for Skype for Business Server 2015, Web Components Server |
KB 4487981 |
May 2019 |
| Cumulative Update 8 for Skype for Business Server 2015, Front End Server and Edge Server |
KB 4464355 |
January 2019 |
| Cumulative Update 7 for Skype for Business Server 2015, Front End server and Edge server |
KB 4340904 |
July 2018 |
| Cumulative Update 6 Hotfix 2 for Skype for Business Server 2015, Front End server and Edge server |
KB 4086059 |
March 2018 |
| Cumulative Update 6, Hotfix 1 for Skype for Business Server 2015, Front End server and Edge server |
KB 4074701 |
January 2018 |
| Cumulative Update 6 for Skype for Business Server 2015, Front End server and Edge server |
KB 4036312 |
December 2017 |
| Cumulative Update 5 for Skype for Business Server 2015, Front End server and Edge server |
KB 4012621 |
May 2017 |
| Cumulative Update 4, Hotfix 1 for Skype for Business Server 2015, Front End server and Edge server |
KB 3207506 |
February 2017 |
| Cumulative Update 4 for Skype for Business Server 2015, Front End server and Edge server |
KB 3199093 |
November 2017 |
| Cumulative Update 3 for Skype for Business Server 2015, Front End server and Edge server |
KB 3149227 |
June 2016 |
| Cumulative Update 2 for Skype for Business Server 2015, Front End server and Edge server |
KB 3134260 |
March 2016 |
| Cumulative Update 1 for Skype for Business Server 2015, Front End server and Edge server |
KB 3097645 |
November 2015 |
| Cumulative Update for Skype for Business Server 2015, Core Components |
KB 3098601 |
September 2015 |
| Cumulative Update for Skype for Business Server 2015, Front End server and Edge server |
KB 3061059 |
June 2015 |
Lync Server 2013 update history
KB 2809243 is the master KB for Lync Server 2013. It contains historical data about all the cumulative updates and hotfixes that have been released for this product.
| 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 Lync Server 2013: April 12, 2022 |
KB 5012681 |
April 2022 |
| Lync Server 2013 Cumulative Update 10, Hotfix 7 |
KB 5010850 |
February 2022 |
| Lync Server 2013 Cumulative Update 10, Hotfix 6 |
KB 5003729 |
May 11, 2021 |
| Lync Server 2013 Cumulative Update 10, Hotfix 5 |
KB 5000675, KB 5000688 |
February 9, 2021 |
| Lync Server 2013 Cumulative Update 10, Hotfix 4 |
KB 4564312 |
July 2020 |
| Lync Server 2013 Cumulative Update 10, Hotfix 3 |
KB 4518345 |
September 2019 |
| Lync Server 2013 Cumulative Update 10, Hotfix 2 |
KB 4501392 |
June 2019 |
| Lync Server 2013 Cumulative Update 10, Hotfix 1 |
KB 4458772 |
January 2019 |
| Lync Server 2013 Cumulative Update 10 |
KB 4295703 |
July 2018 |
| Lync Server 2013 Cumulative Update 9 |
KB 4019183 |
July 2017 |
| Lync Server 2013 Cumulative Update 8, Hotfix 4 |
KB 4014154 |
March 2017 |
| Lync Server 2013 Cumulative Update 8, Hotfix 3 |
KB 3210166 |
January 2017 |
| Lync Server 2013 Cumulative Update 8, Hotfix 2 |
KB 3212869 |
December 2016 |
| Lync Server 2013 Cumulative Update 8, Hotfix 1 |
KB 3200079 |
November 2016 |
| Lync Server 2013 Cumulative Update 8 |
KB 3175336 |
August 2016 |
| Lync Server 2013 Cumulative update 7 |
KB 3140581 |
April 2016 |
| Lync Server 2013 Cumulative Update 6, Hotfix 2 |
KB 3175338 |
January 2016 |
| Lync Server 2013 Cumulative Update 6, Hotfix 1 |
KB 3121213 |
December 2015 |
| Lync Server 2013 Cumulative Update 6 |
KB 3081739 |
September 2015 |
| Lync Server 2013 Cumulative Update 5, Hotfix 10 |
KB 3064728 |
July 2015 |
| Lync Server 2013 Cumulative Update 5, Hotfix 9 |
KB 3051951 |
May 2015 |
| Lync Server 2013 Cumulative Update 5, Hotfix 8 |
KB 3031065 |
February 2015 |
| Lync Server 2013 Cumulative Update 5, Hotfix 7.1 |
KB 3027553 |
December 2014 |
| Lync Server 2013 Cumulative Update 5, Hotfix 7 |
KB 3018232 |
December 2014 |
| Lync Server 2013 Cumulative Update 5, Hotfix 6 |
KB 3010028 |
November 2014 |
| Lync Server 2013 Cumulative Update 5, Hotfix 5 |
KB 3003358 |
October 2014 |
| Lync Server 2013 Cumulative Update 5, Hotfix 2 |
KB 2987511 |
Sept 2014 |
| Lync Server 2013 Cumulative Update 5 |
KB 2937305 |
August 2014 |
| Lync Server 2013 Cumulative Update 4 |
KB 2905040 |
January 2014 |
| Lync Server 2013 Cumulative Update 3 |
KB 881682 |
October 2013 |
| Lync Server 2013 Cumulative Update 2 |
KB 2835432 |
July 2013 |
| Lync Server 2013 Cumulative Update 1 |
KB 2781550 |
February 2013 |
The complete topology consists of seven virtual machines that enable you to fully evaluate the Microsoft Lync 2013, Microsoft Exchange 2013, SharePoint 2013, and UC developer platform APIs (including Microsoft Lync 2013 SDK, Exchange Web Services Managed API 2.0, Microsoft Lync Server 2013 SDK, and Microsoft Unified Communications Managed API 4.0).
| Package name |
Release date |
| Lync Server 2013 Meeting Migration Tool (MMT) |
September 2021 |
| Lync Connectivity Analyzer (32-bit) RETIRED |
June 2017 |
| Lync Connectivity Analyzer (64-bit) RETIRED |
June 2017 |
| Lync Server 2013 Best Practices Analyzer |
October 2012 |
| Lync Server 2013 Capacity Calculator |
July 2013 |
| Lync Server 2013 Debugging Tools |
January 2014 |
| Lync Server 2013 Management Pack |
May 2016 |
| Lync Server 2013 Persistent Chat Resource Kit |
July 2013 |
| Lync Server 2013 Planning Tool |
July 2013 |
| Lync Server 2013 Resource Kit Tools |
January 2014 |
| Lync Server 2013 Stress and Performance Tool |
March 2013 |
| Lync Server 2013 Whiteboard Archiving Viewer |
February 2013 |
| Lync VDI 2013 plugin (32-bit) |
October 2012 |
| Lync VDI 2013 plugin (64-bit) |
October 2012 |
| New Office Visio Stencil |
July 2016 |
Lync Server 2013 downloadable documentation
Lync Server 2010 update history
Lync Server 2010 general information
KB 2493736 is the master KB for Lync Server 2010. It contains historical data about all the cumulative updates and hotfixes that have been released for this product.
| Package name |
KB number |
Release date |
| Lync Server 2010 Cumulative Update 18 Hotfix 1 |
KB 2493736 |
June 2019 |
| Lync Server 2010 Cumulative Update 18 |
KB 2493736 |
January 2019 |
| Lync Server 2010 Cumulative Update 17 |
KB 3148801 |
April 2016 |
| Lync Server 2010 Cumulative Update 16 |
KB 3057803 |
May 2015 |
| Lync Server 2010 Cumulative Update 15 |
KB 3030726 |
February 2015 |
| Lync Server 2010 Cumulative Update 13 |
KB 2982385
KB 2982388 |
September 2014 |
| Lync Server 2010 Cumulative Update 12 |
KB 2957044 |
April 2014 |
| Lync Server 2010 Cumulative Update 11 |
KB 2909888 |
January 2014 |
| Lync Server 2010 Cumulative Update 10 |
KB 2889610 |
October 2013 |
| Lync Server 2010 Cumulative Update 9 |
KB 2860700 |
July 2013 |
| Lync Server 2010 Cumulative Update 8 |
KB 2791381 |
July 2013 |
| Lync Server 2010 Cumulative Update 7 |
KB 2737915 |
October 2012 |
| Lync Server 2010 Cumulative Update 6 |
KB 2701585 |
June 2012 |
| Lync Server 2010 Cumulative Update 5 |
KB 2670352 |
February 2012 |
| Lync Server 2010 Cumulative Update 4 |
KB 2514980 |
November 2011 |
| Lync Server 2010 Cumulative Update 3 |
KB 2571546 |
July 2011 |
| Lync Server 2010 Cumulative Update 2 |
KB 2500442 |
April 2011 |
| Lync Server 2010 Cumulative Update 1 |
KB 2467775 |
January 2011 |
Group Chat 2010 updates
| Package name |
KB number |
Release date |
| Cumulative update for Lync Server 2010, Group Chat |
KB 2884623 |
October 2013 |
| Cumulative update for Lync Server 2010, Group Chat Administration Tool |
KB 2884631 |
October 2013 |
| Cumulative update for Lync 2010, Group Chat |
KB 2884627 |
October 2013 |
| Package name |
Release date |
| Lync Server 2010 SDK |
November 2010 |
| Lync 2010 SDK |
March 2011 |
| Lync Server 2010 Group Chat SDK |
June 2012 |
| Unified Communications Managed API 3.0 SDK |
May 2016 |
| Speech Platform - Server Runtime Languages (version 10.2) |
September 2010 |
| Unified Communications Enhanced Presence Schemas for Microsoft Lync Server 2010 |
November 2010 |
| Package name |
Release date |
| IM an Expert for Microsoft Lync Server 2010 |
March 2012 |
| Lync Server 2010 Best Practices Analyzer |
February 2011 |
| Lync Server 2010 Capacity Calculator |
February 2012 |
| Lync Server 2010 Planning Tool |
February 2011 |
| Lync Server 2010 Resource Kit Tools |
May 2012 |
| Lync Server 2010 Stress and Performance Tool |
March 2011 |
| Lync Server 2010 Visio Stencil |
February 2011 |
| Lync Server 2010 Web Scheduler |
April 2011 |
Resource Kit (technical reference)
Visit the Microsoft Lync Server 2010 Resource Kit download site to download book chapters individually OR download a .zip file that contains all 19 chapters of the Resource Kit.
Group Chat
| Package name |
Release date |
| Lync Server 2010 Group Chat |
November 2010 |
| Lync Server 2010 Group Chat Admin Tool |
November 2010 |
| Lync 2010 Group Chat |
November 2010 |
Trial software
Software updates include any update, update rollup, service pack, feature pack, critical update, security update, or hotfix. See KB 824684 for a description of the standard terminology used to describe Microsoft software updates.