We have an application which has used a local AD to fetch user info. Some customers want to move to the cloud and are using Azure AD. We extended the app to sign users in via owin and now we're fetching users via Microsoft Graph.

However from Microsoft Graph we do not get full user profiles. We want to fetch all properties on users, not just the basic ones.

var client = new RestClient(string.Format("https://graph.microsoft.com/v1.0/users/{0}", userEmail));

request = new RestRequest();

request.Method = Method.GET;

request.AddHeader("Authorization", _token.Token);

var reponse = client.Execute(request);

This only gives me some information though, for example I don't get 'Department' from this.
Is it possible to configure in azure what should be returned here, if so then where? Or do I need something other than /users/?

Different customers might have different special properties that need to be fetched. So the best solution would be to have an endpoint to call and get everything, including special properties not standard in azure ad. After that I can parse it on my side. Is this possible?

The app has permission to read both basic and full profiles. Do I need something more?