Rencently, I want intercept the sensitive message on lync server, and feedback a message, tell the client that its message has been intercepted by the server. How can I do it?

Hi,

You can try to send an instant message from a script:

http://blogs.technet.com/b/nexthop/archive/2011/05/05/sendim.aspx

You can also post the question Lync MSDN forum more lync development expert will help you. Thank you for your understanding.

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