Here is a look at how calendar invitations will look when these changes roll out to the UMICH domain.
From your default inbox list view, you will see new icons in line with the message (so far we've noticed RSVP and Track Package)
If they have a arrow point out (like the track package), it will take you to a external website. If it has a down triangle (like RSVP below), you can do a quick action without opening the mail
If you open the message, it appears similar with just a slight change. It adds the calendar picture to the actual message. In addition, the view my agenda link no longer appears.
Note: the "Yes" button at the top will update your calendar with the new event. The "Yes" link at the bottom will open the event in a new window.