Always mark “Participants can edit appointments” when creating or editing appointments. Defines whether participants by default get the permission to edit an appointment.
Automatically mark all day appointments as “free” when creating or editing appointments. Defines whether all day appointments are displayed as free by default.
use first category color for appointments. Defines whether appointments to which you have assigned a category are displayed in the color of that category. When assigning multiple categories to an appointment, the color of the initially assigned category will be used. See Using Categories
Automatically apply appointment changes received via email to your calendar. Defines in which cases appointment invitations by external contacts automatically will be added to your calendar.
Never. The appointment change will not be applied automatically. The email invitation includes a button for adding the appointment to your calendar.
Only from known senders. The appointment change will be applied automatically if the appointment change comes from a sender who is entered as appointment participant or is entered as a contact in one of your address books.
Always. The appointment change will always be automatically added to your calendar.
Scheduling. Defines which users can view your appointments in the scheduling view. Also see Using the scheduling view