Currently only delegated user permissions are supported, and this is very sub-optimal for bots and service applications that need to monitor Teams presence of users.
Upvoting. Our app is a case management tool, allowing emails to be sent to and from cases being managed. We’d like the app to be able to check the presence status of a user that a case is assigned to so that it can generate an out of office message if someone emails a case when the owner is away. We can’t find a way of doing this with delegated permissions.