Delay or failure when you join an AVMCU meeting in Skype for Business Server 2015 - Microsoft Support [MS]

Delay or failure when you join an AVMCU meeting in Skype for Business Server 2015

Skype for Business Server 2015 More...Less

Symptoms

Assume that the encryption for Skype for Business Server 2015 is disabled. When you try to join an Audio Video Multipoint Conferencing Unit (AVMCU) meeting, you may experience a delay or a failure.

Cause

Removing a muted user with disabled encryption can introduce the delay or failure in the AVMCU.

Resolution

To fix this issue, install the January 2018 cumulative update 6.0.9319.514 for Skype for Business Server 2015, Conferencing Server.