True. There would be no way to put the message on IPMSG into AC. Well you could, but it would not be very easy to do.
As far as your dilemma with others knowing what Employee A did, we have the same problem. But, I don't understand why it can't be solved this way:
If employee A sets up the lab but was unable to get hold of the pateint, don't they save everything to the chart so it is in the Visit History. Wouldn't it say, set up U/S for 1/15/09. Unable to get hold of patient. Waiting on call back, etc.?