When creating an appointment, an invitation is usually sent directly to the customer as soon as an email is stored. However, there are exceptions where invitations should not be sent.

If an appointment has already taken place, you should still record the appointment but without sending an invitation.

For example, it would be nice to work with a button.

Button = Send Invitation

If it is set to No, the appointment should not send an invitation to the customer. If so, the appointment can be sent to the customer.