According to the dictionary, a meeting message
is A meeting message recieved by the user.
This is not the actual message that goes out as invitations. In other words, a meeting message
is the message that shows up in your inbox when someone else invites you to a meeting.
The calendar event
has an attendee
property. I wasn't able to get it to work in the 10 minutes I spent playing with it, but my assumption is an invitation will go out to attendees
when the calendar event is created.
Note that attendee
is a read-only list. When you create the event, you have to specify a list of required attendees
and optional attendees
.