Right now, if a user has a chat open in slack and they tag another user (say for their approval or for their input), it will tag them but nothing will actually happen. The user will not get added to the Thread. If in CWM I manually add the user to the CC field, I think it will add that user in. But we want the ability for users themselves to add others, in the same way they can if they submit an email ticket. HIGH PRIORITY request, as this is leading to confusion/frustration with our existing slack users.