Postman Collections
To see what is going on, be able to test the API without configuring the jtel system, install postman and import the postman collections as described here:
https://github.com/microsoftgraph/microsoftgraph-postman-collections
...
Tests
Application: Get App Only Access Token
...
This request does not exist in the postman collection, you have to create a new GET request as shown below:
URL: https://graph.microsoft.com/beta/users/{{users_id}}/presence
...