Is there are way to set an appoinment as "All Day" via the API

[JustinG]

The bookings API has come a long way, but it still appears to be missing basic things that are available via the Calendar API.

https://learn.microsoft.com/en-us/graph/api/bookingappointment-get?view=graph-rest-1.0&tabs=http

Is there a documented (or undocumented) way to get and set the Bookings appointment item as "All Day" from the API? This option exists in the web interface, so it has to be available in the backend somewhere.

[#2]

Assuming you've already thought of this, but you could do a patch request and update the start and end time of the appointment.

[#3]

Basically, that's what I am doing for now. The ALL-DAY box remains unchecked, but at least the times are correct.