How to check other user availability with Microsoft Graph API?

Question

I'm trying to implement checking availability for specific user (actually a room) in O365 calendar. I'm using Graph API as it's recommended by Microsoft.

My first approach was using POST on https://graph.microsoft.com/v1.0/me/findMeetingTimes with the message body prepared according to template given in Graph API Explorer. On the API Explorer everything seems to work fine but when I try to run exactly the same request with my applications token I receive 403:

{
  "error": {
    "code": "ErrorAccessDenied",
    "message": "Access is denied. Check credentials and try again.",
    "innerError": {
      "request-id": "b130177d-e138-4cc7-8e72-5d3529a9dc24",
      "date": "2017-03-21T08:47:10"
    }
  }
}

I checked the app's delegated permissions in AAD and they seem to be fine. For Microsoft Graph those are granted:

Calendars.ReadWrite.Shared
Calendars.Read.Shared
Calendars.ReadWrite
Calendars.Read

I get exactly the same response (403) when I try to simply list user's events: https://graph.microsoft.com/v1.0/users//events In Graph API Explorer 500 is returned.

I found the following bug description: https://github.com/microsoftgraph/microsoft-graph-docs/issues/559 (and probably this one too) Is it related with the issues above?

Any clue what I might be doing wrong?

Is there any other way to achieve the same using different endpoint or API assuming that I still want to use oAuth for authorization?

I will be grateful for any hint

Update: Outlook Calendar API seems to work. Still appreciate any ideas why Graph API doesn't?

Can you please validate that you have the right permission scopes in you token? you can paste your access token on jwt.calebb.net/ to decode it and look for the scp claim — Yina - MSFT
scp: "Calendars.Read Calendars.Read.All Calendars.ReadWrite User.Read" — Marek

Apoorv Apoorv · Accepted Answer · 2017-09-14T10:47:24

The FindMeetingAPI needs A work or a school account . If you are logging in using your personal email ID , you might not be able to login. Moreover , you need to set permissions to Calendars.Read Calendars.Read.All Calendars.ReadWrite User.Read"

How to check other user availability with Microsoft Graph API?

1 Answers