SEPTEMBER 2026
New parameter for write protection in ‘Create and Modify Appointment’
The appointment API calls create and modify now accept a new writeProtection parameter that lets you protect an appointment from being edited (true) or reset it to the default write permissions (false).
Appointment reminders: new recipients and confirmedOnly parameters
The API calls createAppointment and modifyAppointment now support the parameters recipients (“Erinnerung an”) and confirmedOnly (“Nur bestätigte Teilnehmer”), which define who receives the appointment reminder — both only take effect if a valid value for erinnerung is set as well.