So glad Ical link is now available. Now can we solve why my contacts are not getting the invites?

Testing for 3 days now why suddenly my invites are not being received by my invitees.  Tried all ways -- when I create the meeting, after I create the meeting and it shows in my calendar.  My contacts do not show up when I schedule the meeting. My contacts show up when I pull up link after it is in my Calendar ....