I'm trying to get the values defined in a user created custom form (custom form designed in Outlook for calendar events, pictured below) via Microsofts Graph API.
I've been digging through the documentation for a while now and cannot find anything that would let me do that. I want to get a specific event and get the values defined in the custom form.
Also queried the various extension and schema endpoints and not a trace of the custom data.
Is this even possible with the Graph api?
Based on my test, the values from custom form cannot be obtained by Graph. Although no official docs states this.
If you cannot get the information by the expand=fields too, I'd suggest you to submit a feature request first: https://officespdev.uservoice.com/