Call remains ringing on a PSTN phone when you click "End Meeting" in a Skype meeting in Skype for Business Server 2015

Applies to: Skype for Business Server 2015

Symptoms


Consider the following scenario:

  • You join a Skype meeting in a Microsoft Skype for Business Server 2015 environment.
  • You invite a Public Switched Telephone Network (PSTN) number to the meeting.
  • You click the End Meeting button before the PSTN callee takes the call.

In this scenario, the call continues to ring on the PSTN phone.

Cause


This issue occurs because the Audio Video Multipoint Conferencing Unit (AVMCU) cannot send the Cancel request to the Mediation Server.

Resolution


To fix this issue, install the May 2017 cumulative update 6.0.9319.281 for Skype for Business Server 2015, Front End server and Edge server.