Hi,
Just make sure neither you nor your federated partner have the .Net Bug which stops the presenting whiteboard feature.
We found that after installing the 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, several conferencing modalities no longer function for
users..
The following chart is listing out some KBs which might cause this behavior:
Server OS edition
|
Affected patches
|
Server 2008 R2
|
KB3142024 KB3142033 KB3142037
|
Server 2012
|
KB3142025 KB3142032 KB3142035
|
Server 2012 R2
|
KB3142026 KB3142030 KB3142036
|
Please check the OS edition of Lync server, if any of you have installed the affected patch, please try to uninstall it and restart the server to test if it works.
You could also refer to the following article for more detailed resolution:
https://support.microsoft.com/en-us/help/3165438/some-clients-can-t-connect-to-conferencing-modalities-after-you-instal
Kind regards,
Calvin Liu
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