Keep in mind, we'll morph this as it makes contact with the real world. Here's how it currently works.
We use our tools to produce ICS files. Not a problem for appointments, but for meetings the idea is to make them live.
Here's how we do it. We insert the emails of the attendees into the OWNER's agenda.
SAVE it and SEND it:
Voila, live meetings, simple, inexpensive, and done.