Outlook REST API - How to retrieve a User Photo

Question

I would like to get the photos of my users from outlook and store them in my database. I want it to be done automatically by the programm with no user interaction required, because i know their email and password.

I´m trying to use this guide:

https://msdn.microsoft.com/en-us/office/office365/api/use-outlook-rest-api#UseaclientlibrarytoaccesstheOutlookRESTAPIGetanaccesstoken

I have already registered my website (.NET MVC 5), but I don´t know how to do the authentication and access token part, because half of the links of the guide don´t work and i can´t find any helpful tutorial / code snippets somewhere else.

I´m deeply grateful for any help.

Answer 1

Instead of using Office 365 REST API, we can use the Microsoft Graph.

And since you don't want to the user participate in the authentication, you can using the Client Credentials Grant Flow which permits a web service (a confidential client) to use its own credentials to authenticate when calling another web service, instead of impersonating a user.

Here is the REST API to get the photo for a specific user for your reference:

GET:https://graph.microsoft.com/v1.0/users/[email protected]/photo/$value

The app requires one of the following scopes to request the photo of user:

User.Read; User.ReadBasic.All; User.Read.All; User.ReadWrite.All; User.Read

And refer to here to register the app using the Microsoft Graph API.