During a train ride I was using my mobile as access point.
While working on misc. emails Outlook started to drive me nuts: every 30 seconds or so I got a popup that it had lost connection to the exchange server followed by another popup typically less than 10 seconds later that it had regained connection. These popup-pairs literally came and went in a 30 seconds beat!

How can one suppress these? I like to get these transient balloon popups when emails arrive, but these connection-lost/regained messages I really don't need to see at all! They are absolutely superfluous!

This is on Windows 10 using OL 2013.