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.
We need to display the availability of a 'user' on a customer's website (showing a batch with a telephone number when the user is logged in). Due to the description on the permission of Presence.ReadWrite.All that explicitly says that it gives the app access to read all presence info without logged in user, we where telling the customer that it is possible and we started developing a dummy app.
Now it turns out that the API does not support it in application context. Why?
When will this feature be released?
See https://learn.microsoft.com/en-us/answers/questions/1180351/how-to-get-users-presence-by-an-application please, too.