Getting the access token for Microsoft Graph API

问题:

I'm trying to get the access token for the Microsoft Graph API in order to access a SharePoint document library. My application is a windows service, hence I'm following the procedure described here.

But when I try to get the access token, the response that I get doesn't have the scope value. Below is my response:

{
  "token_type": "Bearer",
  "expires_in": "3600",
  "expires_on":"1492452559",
  "not_before": "1492448659",
  "resource": "https://graph.microsoft.com",
  "access_token": "Token"
}

Because of this when I try to query the Graph API with this access token, I'm getting an error saying: Either scp or roles claim need to be present in the token

Can someone please help me on how to get this working? Thanks in advance.

回答1:

That seems your client application hasn't set the appropriate app permissions when using client credential flow , below is an illustration of application permissions section in Azure AD classic portal. Please select appropriate permissions needed and retry :

And in addition , when using client credential flow to get the access token , you could check the roles claims in access token(that is the way to check the app permission, not in token response) , using a tool like http://jwt.calebb.net/ to decode the access token and check the app permissions :