c6dbaba9_ent_Error_Codes___Tom_Talks_UC__Additional_Information
[Mode] Conference [Error Id] 606 [Error Message] Cannot invite [user name] to join this meeting. [Additional Information] 
Cannot invite [user name] to join this meeting. This person is using a messaging application that does not support more than two participants in a conversation.
Lync Client Error Codes | Tom Talks UC
Additional Information