Summary
This update enables Unified Communications Web API (UCWA) to auto populate the OTHER CONTACTS and FAVORITES default groups when you sign in to a Microsoft Skype for Business mobile client for the first time in a Microsoft Skype for Business Server 2015 environment.
How to get this update
To get this update, install the May 2017 cumulative update 6.0.9319.281 for Skype for Business Server 2015, Web Components Server.