Booked from "On a call" — both monthly support visits and trainings. Remove one here to cancel it (clears its email queue, sends a cancellation email, and removes it from Outlook if it was pushed there).

Saved from "On a call" when you couldn't finish booking someone on the spot.

Confirmation/reminder emails send for real through your signed-in Outlook account. If something ever goes wrong with a send, it'll show as "failed" below instead of "sent".