Assume that you sign in Microsoft Skype for Business 2016 by using a Lenovo Yoga920 laptop and enable the Automatic Gain Control feature through Options > Audio Device > Automatically adjust microphone volume on calls. When you join a Skype call, you may find that the microphone volume is still too low.
To fix this issue, install the June 5, 2018, update (KB4022155) for Skype for Business 2016.
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.