InvalidAuthenticationToken Error : when Using office365 planner Tasks API

Question

I am trying to get my office365 planner task using the Microsoft Graph API but I am getting below error:

GET https://graph.microsoft.com/beta/me/tasks

{
  "error": {
    "code": "InvalidAuthenticationToken",
    "message": "Bearer access token is empty.",
    "innerError": {
      "request-id": "4f209643-f3f6-4256-87b7-cf4f2fd489eb",
      "date": "2016-05-16T09:03:33"
    }
  }
}

Jackie · Accepted Answer · 2016-05-17 05:07:43Z

3

The error message is pretty self-explanatory,

"message": "Bearer access token is empty."

You need to be authenticated before you can make this RESTful API call.

If you're developing your own app, follow this tutorial to learn about OAuth2 workflow, http://graph.microsoft.io/en-us/docs/platform/rest

If you're using Graph Explore, make sure you're logged in before call that API.

edited May 17, 2016 at 5:07

answered May 17, 2016 at 2:26

Jackie

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5 Comments

SSK Over a year ago

When i try to login through Graph Explore it gives me below error AADSTS90093: Calling principal cannot consent due to lack of permissions. What are the steps need to be perform for getting permission , please suggest as i am new to Graph-API and Azure AD.

Jackie Over a year ago

Are you logged in as an admin user? You need to log in as an admin or try to consent the user with the proper rights.

SSK Over a year ago

Hi Jackie : I tried login with admin user too for sign in but same error . also where & how can i consent the user with proper rights ? kindly note i am accessing the api through Graph Explore .

empz Over a year ago

Any updates on this? Really frustrating that MS doesn't provide any easy way to test MS Graph....

Guillaume Kiz Over a year ago

Update : You, now, have a link to modify your rights from graph explorer, but it generate an error when attempting (even with tenant admin account). Cheers

danfer · Accepted Answer · 2016-12-09 14:42:09Z

I use this Controller's action code for granting admin consent:

//<Summary>
    //Used to grant admin consent to Azure AD apps
    //</Summary>
    public virtual ActionResult AdminConsentApp()
    {
        string strResource = "https://graph.microsoft.com";
        string strRedirectController = "https://localhost:[my local debug port number]";

        string authorizationRequest = String.Format(
            "https://login.windows.net/common/oauth2/authorize?response_type=code&client_id={0}&resource={1}&redirect_uri={2}&prompt={3}",
                Uri.EscapeDataString(SettingsHelper.ClientId),
                Uri.EscapeDataString(strResource),
                Uri.EscapeDataString(String.Format("{0}", strRedirectController)),
                Uri.EscapeDataString("admin_consent")
                );

        return new RedirectResult(authorizationRequest);
    }

Hope this help, Cheers, Danfer.

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