Lync / Skype for business – PowerPoint / Whiteboard / Poll – not working issue

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Security Update for .NET Framework (3156757) rated Important breaks internal conferencing for Lync Server 2010, 2013 and Skype for Business users.

 

 

Clients, installing 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, reported that they can’t connect to certain conferencing modalities.

 

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Moreover, Lync Web App may not function correctly in a Lync Server 2010 environment.

The Resolution:

  • Uninstall the KB3142030 from your Front-end Servers , then reboot all servers (this is what we did and worked   )
  • The other option is to modify the registry, please backup the registry before editing and/or contact your IT Administration staff.
  • We need to modify the registry to Disable SCH_SEND_AUX_RECORD, for the Lync Server Web Conferencing Server on the Front-End Servers.
  • Add the following registry subkey:
    HKEY_LOCAL_MACHINE\Software\ Microsoft\.NETFramework\< version_number>\System.Net. ServicePointManager. SchSendAuxRecord
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  • Create a new DWORD, where the name is the Fully qualified path for the application .exe ie.(C:\Program Files\Microsoft Lync Server 2013\Web Conferencing\DataMCUSvc.exe)
    Value data: 0Screen Shot 2017-02-01 at 22.27.48
  • Reboot the Front-end Servers.
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