Symptoms
After you create a topic feed in Microsoft Skype for Business 2015 (Lync 2013), you find that there's no option to only apply it to a subset of rooms. Additionally, you cannot filter the top-level search to a specific chat room.
Resolution
To fix this issue, install the January 3, 2017, update (KB3141468) for Skype for Business.Note Lync 2013 was upgraded to Skype for Business in April 2015.
