Symptoms
The group chat (GC) room roster in Microsoft Skype for Business 2016 currently opens at 200px. However, it should open at 100px as per UBS requirements. Additionally, if you drag the GC room to a new position, it should stay at the new size for all the other rooms.
Resolution
To fix the issue, install the February 7, 2017, update (KB3141501) for Skype for Business 2016.
