The update to OcsMcu.msp can't be applied when conferencing is disabled in Skype for Business Server 2015

Applies to: Skype for Business Server 2015

Symptoms


Assume that you have a topology where conferencing is disabled. This means that ASMCU and AVMCU should not be installed. When you try to apply patches to Microsoft Skype for Business Server 2015, you find OcsMcu.msp is not able to be installed.

Cause


This issue occurs because OcsMcu.msp tries to find the RTCASMCU and RTCAVMCU services that aren't present because conferencing is disabled on the topology.

Resolution


To fix this issue, install the May 2017 cumulative update 6.0.9319.281 for Skype for Business Server 2015, Conferencing Server.