Microsoft Graph API Outlook Post not possible

Question

Hello,

We have been making an Outlook calendar entry (event in the shared calendar) via the Microsoft Graph API for some time now. Unfortunately, since today this no longer works, although we have not changed anything.

The error message is POST:

{

    "error": {

        "code": "ErrorInternalServerError",

        "message": "An internal server error occurred. The operation failed."

    }

}

URL: https://graph.microsoft.com/v1.0/{email}/calendars/{id}/events

The body:

{

    "subject": "Test",

    "body": {

        "contentType": "Text",

        "content": "test"

    },

    "start": {

        "dateTime": "2024-08-01T08:00:00",

        "timeZone": "Europe/Berlin"

    },

    "end": {

        "dateTime": "2024-08-02T16:00:00",

        "timeZone": "Europe/Berlin"

    }

}

A GET from the URL works: https://graph.microsoft.com/v1.0/{email}/calendars/{id}/events

but not a POST.

Can you help us?

Answer 1

Hello @EdEntw ,

Thank you for choosing Microsoft!

To create an event in the shared calendar try using the POST users/{email}/calendars/{id}/events API, please ensure the user has the necessary permissions to edit the shared calendar.

The 500 error is a server-side issue that can arise from various factors, such as internal server errors, incorrect API request formats, or problems with the requested resources. If the error is intermittent and the request succeeds upon retry, it might indicate a temporary server issue or a transient network problem. I have successfully created an event in the shared calendar with the required access. You can refer to the screenshot below.

You could wait for some time and then test again. If the issue isn't fixed, try calling the API in the Graph Explorer or Postman with a user who has permission to edit this shared calendar. If the issue persists, I suggest submitting a ticket in the admin center with the request ID and timestamp so you can get detailed error information.

Documentation reference: https://learn.microsoft.com/en-us/graph/api/calendar-post-events?view=graph-rest-1.0&tabs=http

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".