To notify people other than the actual participants when a booking is completed, add Notification email addresses under Notification & publication settings in Advanced settings on the calendar creation or edit page.
This feature is available on the Basic Plan and above.
When notification email addresses are added, a booking confirmation email is sent to those addresses as well as to the actual participants after scheduling is completed.
You can add up to five notification email addresses per calendar.
For each notification email address, you can select Japanese or English as the email language.