Create groups calendar events fails

Question

POST https://graph.microsoft.com/v1.0/groups/4a3c5f77-463e-XXXXXX-fa8XXXXXX/calendar/events
Accept: application/json
Authorization: Bearer <Token>
Content-Type: application/json; charset=utf-8


{
  "originalStartTimeZone": "UTC",
  "originalEndTimeZone": "UTC",
  "start": {
    "dateTime": "2015-12-03T09:30:00-00:00",
    "timeZone": "UTC"
  },
  "end": {
    "dateTime": "2015-12-03T10:30:00-00:00",
    "timeZone": "UTC"
  },
  "responseStatus": {
    "response": "Accepted",
    "time": "2015-12-01T18:34:00-08:00"
  },
  "reminderMinutesBeforeStart": 15,
  "isReminderOn": true
}

Error:

{
  "error": {
    "code": "ErrorInternalServerError",
    "message": "The SMTP address has no mailbox associated with it.",
    "innerError": {
      "request-id": "f62423b0-0ade-494d-8c8c-1b56db60b524",
      "date": "2015-12-02T10:39:44"
    }
  }
}

I have tried with both post url mentioned below,

POST /groups/<id>/events
POST /groups/<id>/calendar/events

I have tried with different group types which include security enabled, mail-enabled and Unified Groups but I am seeing the same error message, any help would be appreciated.

Answer 1

Group calendar access is not supported in app-only authorization flow.

We are working on returning a better error for this case.

Answer 2

I believe that you will get this error for security groups or mail-enabled security groups. This will ONLY work for Unified (O365) groups. Only those types of group have content associated with them. To ensure you are creating a unified group correctly, here's the request and payload of a typical request:

POST https://graph.microsoft.com/v1.0/groups

{
  "description":"Group 5bff4 is the best ever",
  "displayName":"Unified group 5bff4",
  "groupTypes":["Unified"],
  "mailEnabled":true,
  "mailNickname":"Group5bff4",
  "securityEnabled":false
}

Then your request to ../groups//events should work. NOTE: creation of the underlying group mailbox may take a few seconds (something we are working to improve), so creation of the event directly after group creation may fail.

Hope this helps,