c6dbaba9_ent_Error_Codes___Tom_Talks_UC__Additional_Information
[Mode] Sharing [Error Id] 488 [Error Message] Some people did not respond to your sharing invitation. They may be using earlier versions of the client [Additional Information] 
One or more people did not respond to your sharing invitation. They need to be running at least Microsoft Office Communicator 2007 R2, which is required to respond to sharing invitations and to participate in sharing sessions.
Lync Client Error Codes | Tom Talks UC
Additional Information