We are using Live Communictions Server (LCS) 2005 and Office Communicator (MOC) 2005. We would like to protect this traffic. I am wondering how would you do it? I thought about using nbar rtp video, but was curious, does the MOC client use a specific RTP payload type? Could I use this to get more granular so that only MOC video calls would be protected? I know you can use nbar's rtp video payload to do this but I am not sure if it would be possible with MOC.