Track responses to shared invitations
Any iCloud user who is a participant in a shared calendar can see the responses of the other invitees.
See invitation responses
Click the Share button to the right of the calendar’s name.
In the Calendar Sharing window, view the symbol next to the name of each invitee:
A green checkmark means the invitee has joined as a participant.
A red “X” means the invitee declined the shared invitation.
A gray question mark means the invitee hasn’t yet joined or declined the invitation.
If you want to encourage your invitees to respond to an invitation, you can resend invitations at any time.