1.   First, we must execute a POST web request with several information in the body in order to get a token.

•      Request URL (as POST):
          https://login.windows.net/<ID_TENANT>/oauth2/token

•      You can get the tenant id in the overview of the application created in the Azure portal

•      Body:

•      grant type = the string "client_credentials"

•      ClientID = The application id. You can get in the overview of the application created in the Azure portal.

•      client secret = The client secret generated in the portal azure

•      resource = the URL of your CRM (https://xxxxxxx.crm6.dynamics.com/)

•      Response :
          This request should return a Json string containing the token:  

2.   Test: WhoAmI

•      Then, you just have to use this token as “Bearer” in the header of any API CRM call requests.

•      Let’s take an example with the WhoAmI method which is supposed to return the id of the calling user.

•      Request URL (as GET):
          https://<CRM_URL>/api/data/v9.0/WhoAmI()

•      Header:

Bearer Token : The access token get in the second step 

Response :

          This request should return a Json string containing the UserId: