I am using custom C# Lync 2013 client with a sever i just recently setup. I need to develop a custom Lync Client that allows audio video conference. I found a really well explained demo named AudioVideoConversation (https://code.msdn.microsoft.com/office/Lync-2013-Use-the-Lync-68eabecb)

Looking in the code i found discovered that i had to run the Lync Client in UISuppressionMode to allow the new C# Client to view the videos. So i did some searches and found it was a key in the registry that had to be edited/created. And so i did as i found in Channel9. 

I started my regular Lync client and added the registry entry add the good place for Lync 2013.

After, it needed to be closed and restarted.

But the Client UI started, like i had not changed a thing. I have been working on this for hours without any fixes. 

UPDATE:

From MSDN :

You can set the Lync 2013 suppression mode when you install the Lync client. At the command prompt, start the Lync installation .exe with a command-line argument in the following table.

I tried using the Office install for Lync online with that command, and the arguments isn't valid.

Setup.exe /FullUisuppression

I downloaded Lync Basic client from the Windows Download center. Didn't work either.

lyncentry.exe /FullUisuppression

• Edited by Antoine Savoie-Fortin Friday, October 24, 2014 2:42 PM
• Changed type Eason HuangMicrosoft contingent staff, Moderator Sunday, October 26, 2014 1:49 AM more related to Lync SDK

This is location for 

 Lync 2013, the setting is now located in a completely different part of the registry:

[HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Lync]
 "UISuppression"=dword:00000001
This might help 
http://channel9.msdn.com/posts/Sign-In-to-Lync-with-UI-Suppressed

Thank you for your answer.

This is exacly the path i used in the registry to edit the SupressionMode. But i am not sure if the name of the dword variable i used is "UISupression" or "UISupressionMode".

I will look at it monday when i will be in reach of the domain and computers used for these Lync's Client Test.

Thank you again for your answer, have a good week-end.

Hi,

You might post the issue on Lync MSDN forum and more developing expert will help to verify if this can be achieved using Lync SDK. Thank you for your understanding.

http://social.msdn.microsoft.com/Forums/en-US/communicatorsdk/threads

Best Regards,

Eason Huang