You install security update 3085500 that is documented in security bulletin MS15-097 Security Update for Lync 2013 (Skype for Business) that was released on September 8, 2015.
You join a meeting by using the Skype for Business client (version: 15.0.4753.1000).
You click the More Options button, and then you click Start Recording.
In this scenario, nothing happens. You don't see any notification or visual indication that recording has started. Additionally, when you open the recording manager, you don't see any file or progress status.