Skype for Business Server 2015 Conferencing modalities no longer function after install of Security Bulletin MS16-065

Several conferencing modalities no longer function for internal users after install of Microsoft .NET Framework Security Update MS16-065 on a Front End or Standard Edition server for Lync Server 2010, Lync Server 2013, or Skype for Business Server 2015.

Error messages you may receive:

• We can’t connect to the server for presenting right now
• An error occurred during the Skype Meeting
• Network issues are keeping you from sharing notes and presenting whiteboards

Ref: https://support.microsoft.com/en-us/kb/3165438