Can't escalate a peer-to-peer call to a conference if VbSS is used in screen sharing in Skype for Business on Mac

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Applies To

Skype for Business Server 2015 Skype for Business for Mac

Symptoms

In Microsoft Skype for Business Server 2015, when a Skype for Business on Mac client user tries to add a new participant to a peer-to-peer call that has a screen sharing by using the Video-based Screen Sharing (VbSS) feature, you may find the escalation fails and the participant can't receive the meeting invitation to join the peer-to-peer session.

Resolution

To fix this issue, install the January 2019 cumulative update 6.0.9319.537 for Skype for Business Server 2015 and Unified Communications Managed API 5.0 Runtime.