Sign in with Microsoft
Sign in or create an account.
Select a different account.
You have multiple accounts
Choose the account you want to sign in with.


Consider the following scenario:

  • You apply May 2017 cumulative update for Microsoft Skype for Business Server 2015.

  • Some Video-based Screen Sharing (VbSS) supported clients and legacy clients are in a Skype for Business meeting.

In this scenario, you might be unable to join the application sharing session of the meeting.


This issue occurs because Skype for Business Application Sharing Server (ASMCU) doesn't include the rtcp-mux attribute in the Session Description Protocol (SDP) after the application sharing session is failed from VbSS to the remote desktop protocol (RDP) session.


To fix this issue, install the December 2017 cumulative update 6.0.9319.510 for Skype for Business Server 2015 and Unified Communications Managed API 5.0 Runtime.

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Was this information helpful?

What affected your experience?
By pressing submit, your feedback will be used to improve Microsoft products and services. Your IT admin will be able to collect this data. Privacy Statement.

Thank you for your feedback!