A user could not participate on desktop sharing session, neither in conference nor in a p2p session. Other video related submission were working, like video or white board.
First I was guessing it could have been the video driver, but if video in Lync was working it didn't sound quite logic.
After investigating this problem, I saw a ActiveX blocking Error Message in the Eventviewer:
The ActiveX Compatibility setting disabled loading this object to help protect your security.
This let me investigate more closer into Internet Explore. Well even there is couldn't see anything directly:
Microsoft reports several TechNet article:
So you need to change the ActiveX Control Settings for Lync 2013 Client:
SOLUTION:Go and d…