Your comments

It is almost impossible to believe that there is a chat product in existence (Control), that doesn't tell you that the other party has left the conversation.  This is a huge issue for us.  No one understands it because it goes against any common sense or feature in the rest of the IM world.  Further, it doesn't give the entire conversation in email, or the users name.  I don't really want those features, I want the chat to be greyed out when no one is connected to the machine to receive the chat, and notice in the chat if either side leaves.  Sort of like what everyone else has been doing for decades.