Problem with GraphML Create new booking appointment

Question

We are posting the following JSON:

{
    "@odata.type": "#microsoft.graph.bookingAppointment",
    "customerTimeZone": "UTC",
    "customerName": "Jordan Miller",
    "customerEmailAddress": "******@contoso.com",
    "customerPhone": "213-555-0199",
    "customerNotes": null,
    "end": {
        "@odata.type": "#microsoft.graph.dateTimeTimeZone",
        "dateTime": "2025-03-21T17:30:00.0000000+00:00",
        "timeZone": "UTC"
    },
    "isCustomerAllowedToManageBooking": false,
    "isLocationOnline": true,
    "optOutOfCustomerEmail": false,
    "anonymousJoinWebUrl": null,
    "postBuffer": "PT10M",
    "preBuffer": "PT5M",
    "serviceId": "****",
    "start": {
        "@odata.type": "#microsoft.graph.dateTimeTimeZone",
        "dateTime": "2025-03-21T17:00:00.0000000+00:00",
        "timeZone": "UTC"
    },
    "maximumAttendeesCount": 5,
    "filledAttendeesCount": 1
}

on https://graph.microsoft.com/v1.0/solutions/bookingBusinesses/{bookingservice-id}/appointments

(for obvious reasons, serviceID and full URL are obfuscated for security purposes)

we get the following response:

{
    "error": {
        "code": "UnknownError",
        "message": "",
        "innerError": {
            "date": "2025-03-21T10:23:52",
            "request-id": "a9fca3f9-c853-4337-b831-5518f1bc585b",
            "client-request-id": "***"
        }
    }
}

(client request ID also obfuscated)

Please advise.

Thank you.

Answer 1

Hello Konstantinos Spiliakos,

Thank you for reaching out to Microsoft Support!!

While creating a new booking appointment using Graph API v1.0, i tried replicating the scenario by replacing the start and end properties with startDateTime and endDateTime and we are able to create the booking appointment as expected.

Please try the above workaround and let us know the response.

Hope this helps.

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