Can't use Lync SDK Automation to start PSTN phone calls in Skype for Business 2016

Applies to: Skype for Business 2016

Symptoms


When you call a telephone number by using Microsoft Skype for Business 2016 in a Lync SDK application (for example, the Microsoft Sales Experience (MSX) tool), the call fails.

Resolution


To fix this issue, install the November 3, 2020, update (KB4486710) for Microsoft Skype for Business 2016.