What is the latest Skype for Business User-Agent string?
When using a client other than Skype for Business (formerly known as Lync) to connect with your Office 365 account, you’ll need to provide the Microsoft Lync servers with a user-agent string they recognize as an “acceptable” client. The reasoning behind this is surely to give you the best possible experience and not at all to lock out other messaging clients.
Personally, I use Pidgin with the third party plugin “pidgin-sipe” to connect with the Office 365 service. However, this will only work as long as an “acceptable” user-agent string is provided.
As of March 2019, Skype for Business 2016 identifies itself with the following user-agent string:
If you try to connect with an invalid user-agent string you’ll get the following message, which includes a link to download Skype.
CSeq: 6 REGISTER Warning: 311 lcs.microsoft.com "http://go.microsoft.com/fwlink/?LinkID=213295" Server: RTC/6.0
I’ll keep this information up to date as long as I have a valid Office 365 subscription.
|Skype for Business 2016||UCCAPI/16.0.11231.20066 OC/16.0.11231.20130|
|Skype for Business 2016||UCCAPI/16.0.11126.20010 OC/16.0.11126.20132|
|Skype for Business 2016||UCCAPI/16.0.11029.20045 OC/16.0.11029.20079|
|Skype for Business 2016||UCCAPI/16.0.11001.20054 OC/16.0.11001.20074|
|Skype for Business 2016||UCCAPI/16.0.10730.20030 OC/16.0.10730.2008|
|Skype for Business 2016||UCCAPI/16.0.10325.20036 OC/16.0.10325.20082|
|Skype for Business 2016||UCCAPI/16.0.9330.2087 OC/16.0.9330.2087|
|Skype for Business 2016||UCCAPI/16.0.9126.2116 OC/16.0.9126.2116|
|Skype for Business 2016||UCCAPI/16.0.9029.2167 OC/16.0.9029.2167|
|Skype for Business 2016||UCCAPI/16.0.8827.2131 OC/16.0.8827.2131|
|Skype for Business 2016||UCCAPI/16.0.8625.2055 OC/16.0.8625.2090|
|Skype for Business 2016||UCCAPI/16.0.8229.2045 OC/16.0.8229.2073|
|Skype for Business 2016||UCCAPI/16.0.8067.2032 OC/16.0.8067.2032|
|Skype for Business 2016||UCCAPI/16.0.7766.5281 OC/16.0.7766.2047|
|Skype for Business 2016||UCCAPI/16.0.6965.5308 OC/16.0.6965.2117|
|Skype for Business 2016||UCCAPI/16.0.6965.5302 OC/16.0.6965.2105|
|Skype for Business 2016||UCCAPI/16.0.6741.5312 OC/16.0.6741.2071|
|Skype for Business 2016||UCCAPI/16.0.6741.5299 OC/16.0.6741.2056|
|Skype for Business 2016||UCCAPI/16.0.6001.1078 OC/16.0.6001.1078|
|Skype for Business 2016||UCCAPI/16.0.6001.1073 OC/16.0.6001.1073|
|Skype for Business 2016||UCCAPI/16.0.6001.1061 OC/16.0.6001.1061|
|Skype for Business 2016||UCCAPI/16.0.6001.1043 OC/16.0.6001.1043|
|Skype for Business 2015*||UCCAPI/15.0.4823.1000 OC/15.0.4823.1000|
|Skype for Business 2015||UCCAPI/15.0.4813.1000 OC/15.0.4809.1000|
|Skype for Business 2015||UCCAPI/15.0.4805.1000 OC/15.0.4805.1001|
|Skype for Business 2015||UCCAPI/15.0.4753.1000 OC/15.0.4753.1003|
*= Current User-Agent from Skype for Business 2015
This page was last updated on Tuesday, March 19, 2019.