Team Chat, Calendar, & Tasks

I see an initial notification that someone sent a message, but if I miss that initial pop up I have no way of knowing that I received a chat message. Email notifications are not preferred or I would just use email for my communication. It would be nice if there was some kind of notification in the task bar indicating a message awaits.

Glip used to tell us if the sender of a glip message is sending it from a desktop vs a mobile app.How can we enable that feature or is there a chance to bring that back?