As per my testing, when participant respond to the meeting with Email organizer, I am able to get the participant status in response.
As per the documentation, The response type none means
none
– from organizer's perspective. This value is used when the status of an attendee/participant is reported to the organizer of a meeting.
As an example, if attendee Alex hasn't responded to a meeting request, getting Alex' response status for that event in Alex' calendar returns notResponded
. Getting Alex' response from the calendar of any other attendee or the organizer's returns none
. Getting the organizer's response for the event in anybody's calendar also returns none
.
But as you confirmed you have created that meeting and also you received mail from the attendees for accepted the meeting. I would recommend you to raise a support case with Microsoft Graph, a Support Engineer will be able to assist you better. You can raise support ticket from
http://aad.portal.azure.com/ or https://admin.microsoft.com/#/support/requests.
Hope this helps.
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