When sending a message in the Task Management > Messaging area, you can only send a message to a single user or "ALL" users. It would be beneficial at times for the user to be able to send a message to multiple users at once (similar to how you can send a message to multiple users/groups in the EMR). It does appear that you can send to a group, but this will not always resolve the issue as there may not be a group setup for the particular subset of users.