One thing that drives me crazy when I am sharing my screen during a meeting or watching a meeting is when Outlook pops up a message in the lower right hand portion of the screen with new email notifications.
This image here is what I am referring to, I randomly googled Outlook pop-up alerts and this was the first one I came across.
I strongly encourage users to turn this function off; its so distracting when you are trying to teach or lead a meeting.
How do you do this you ask?
With Outlook open, go to the File menu, and select Options.
On the pop-up menu, go to the Mail tab. Then scroll down to Message arrival and uncheck the box for Display a Desktop Alert.
Then click OK.
And that's it! No more pesky notifications that everyone will look at when you are hosting a meeting. (Except for Skype notifications or pings if you forget to put yourself on Do Not Disturb like I do, all the time!)