Here is the list for the Lync 2013/Skype for Business 2015 client updates:
| Version | Release Date | KB Article | Download | |
|---|---|---|---|---|
| 15.0.5241.1000 | May 5, 2020 | KB4484289 | 32 bit | 64 bit |
| 15.0.5163.1000 | August 6, 2019 | KB4475564 | 32 bit | 64 bit |
| 15.0.5145.1001 | June 4, 2019 | KB4464593 | 32 bit | 64 bit |
| 15.0.5137.1000 | May 7, 2019 | KB4464547 | 32 bit | 64 bit |
| 15.0.5127.1000 | April 2, 2019 | KB4462207 | 32 bit | 64 bit |
| 15.0.5111.1000 | February 5, 2019 | KB4462135 | 32 bit | 64 bit |
| 15.0.5101.1000 | January 2, 2019 | KB4461557 | 32 bit | 64 bit |
| 15.0.5085.1000 | November 13, 2018 | KB4461487 | 32 bit | 64 bit |
| 15.0.5075.1000 | October 2, 2018 | KB4461446 | 32 bit | 64 bit |
| 15.0.5067.1000 | September 4, 2018 | KB4092457 | 32 bit | 64 bit |
| 15.0.5059.1000 | August 7, 2018 | KB4032250 | 32 bit | 64 bit |
| 15.0.5049.1000 | July 10, 2018 | KB4022225 | 32 bit | 64 bit |
| 15.0.5041.1000 | June 5, 2018 | KB4022170 | 32 bit | 64 bit |
| 15.0.5031.1000 | May 1, 2018 | KB4018377 | 32 bit | 64 bit |
| 15.0.5023.1000 | April 3, 2018 | KB4018334 | 32 bit | 64 bit |
| 15.0.5015.1000 | March 6, 2018 | KB4018290 | 32 bit | 64 bit |
| 15.0.5007.1000 | February 6, 2018 | KB4011678 | 32 bit | 64 bit |
| 15.0.4997.1000 | January 2, 2018 | KB4011638 | 32 bit | 64 bit |
| 15.0.4989.1000 | December 5, 2017 | KB4011284 | 32 bit | 64 bit |
| 15.0.4981.1000 | November 7, 2017 | KB4011255 | 32 bit | 64 bit |
| 15.0.4971.1000 | October 10, 2017 | KB4011179 | 32 bit | 64 bit |
| 15.0.4963.1000 | September 12, 2017 | KB4011107 | 32 bit | 64 bit |
| 15.0.4953.1000 | August 1, 2017 | KB4011046 | 32 bit | 64 bit |
| 15.0.4945.1000 | July 5, 2017 | KB3213574 | 32 bit | 64 bit |
| 15.0.4933.1000 | June 13, 2017 | KB3191939 | 32 bit | 64 bit |
| 15.0.4927.1000 | May 2, 2017 | KB3191876 | 32 bit | 64 bit |
| 15.0.4919.1000 | April 4, 2017 | KB3178731 | 32 bit | 64 bit |
| 15.0.4911.1000 | March 14, 2017 | KB3172539 | 32 bit | 64 bit |
| 15.0.4903.1001 | February 7, 2017 | KB3161988 | 32 bit | 64 bit |
| 15.0.4893.1000 | January 3, 2017 | KB3141468 | 32 bit | 64 bit |
| 15.0.4885.1000 | December 6, 2016 | KB3127976 | 32 bit | 64 bit |
| 15.0.4875.1001 | November 1, 2016 | KB3127934 | 32 bit | 64 bit |
| 15.0.4867.1000 | October 11, 2016 | KB3118348 | 32 bit | 64 bit |
| 15.0.4859.1002 | September 6, 2016 | KB3118281 | 32 bit | 64 bit |
| 15.0.4849.1001 | August 9, 2016 | KB3115268 | 32 bit | 64 bit |
| 15.0.4841.1000 | July 5, 2016 | KB3115261 | 32 bit | 64 bit |
| 15.0.4833.1001 | June 7, 2016 | KB3115033 | 32 bit | 64 bit |
| 15.0.4815.1000 | April 12, 2016 | KB3114944 | 32 bit | 64 bit |
| 15.0.4805.1000 | March 8, 2016 | KB3114831 | 32 bit | 64 bit |
| 15.0.4797.1000 | February 9, 2016 | KB3114732 | 32 bit | 64 bit |
| 15.0.4787.1002 | January 12, 2016 | KB3114502 | NA | NA |
| 15.0.4779.1001 | December 8, 2015 | KB3114351 | NA | NA |
| 15.0.4771.1001 | November 10, 2015 | KB3101496 | NA | NA |
| 15.0.4763.1001 | October 13, 2015 | KB3085581 | NA | NA |
| 15.0.4753.1000 | September 8, 2015 | KB3085500 | NA | NA |
| 15.0.4745.1000 | August 11, 2015 | KB3055014 | NA | NA |
| 15.0.4737.1001 | July 14, 2015 | KB3054946 | NA | NA |
| 15.0.4727.1001 | June 9, 2015 | KB3054791 | NA | NA |
| 15.0.4719.1001 | May 12, 2015 | KB3039779 | NA | NA |
| 15.0.4711.1002 | April 14, 2015 (1) | KB2889923 | NA | NA |
| 15.0.4701.1000 | March 10, 2015 | KB2956174 | NA | NA |
| 15.0.4693.1001 | February 10, 2015 | KB2920744 | NA | NA |
| 15.0.4675.1000 | December 9, 2014 | KB2910927 | NA | NA |
| 15.0.4667.1001 | November 11, 2014 | KB2899507 | NA | NA |
| 15.0.4659.1001 | October 2014 | KB2889929 | NA | NA |
| 15.0.4649.1000 | September 2014 | KB2889860 | NA | NA |
| 15.0.4641.1001 | August, 2014 | KB2881070 | NA | NA |
| 15.0.4623.1000 | June, 2014 | KB2850074 | NA | NA |
| 15.0.4615.1001 | May, 2014 | KB2880980 | NA | NA |
| 15.0.4605.1003 | April, 2014 | KB2880474 | NA | NA |
| 15.0.4569.1508 | March, 2014 | KB2863908 | NA | NA |
| 15.0.4569.1503 | February, 2014 (SP1) | KB2817430 | NA | NA |
| 15.0.4551.1005 | November 7, 2013 | KB2825630 | NA | NA |
| 15.0.4517.1508 | August 2013 | KB2817621 | NA | NA |
| 15.0.4505.1510 | July 9, 2013 | KB2817465 | NA | NA |
| 15.0.4481.1004 | May, 2013 | KB2768004 | NA | NA |
| 15.0.4454.1509 | February, 2013 | KB2760512 | NA | NA |
| 15.0.4420.1017 | RTM | NA | NA | NA |
(1) This update introduces the Skype for Business 2015 User Interface.
Please note that the download links listed are for the Lync 2013/Skype for Business 2015 update file, we should always check the necessary prerequisites in the related KB article.
As mentioned in a previous post Lync 2013/SfB 2015 client shares the same build as Lync 2013 VDI Plugin, this means that to update the client from RTM we need to follow the same steps described in:
How to update the Lync VDI 2013 Plugin
To check the version we need to go to Options > Help > About Microsoft Lync/SfB:
Lync 2013 UI
Skype for Business 2015 UI
