i try to develop a web-service which displays some user information from an Office 365 instance using the Microsoft Graph.
I'm able to query groups, user details and so on, but i'm not able to get the user profile picture as described here http://graph.microsoft.io/docs/api-reference/v1.0/api/profilephoto_get. It always return a 403, even when my service had all rights (for testing purpose).
The webservice is a deamon as described here: http://graph.microsoft.io/docs/authorization/app_only, so no actual user is logged in. Could that be an issue? Is it possible to query the photo information using a deamon?