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.
DarrelMiller There is any plan to support Application access on this API call?
Delegated access means also that in a multi user application, where every user can see the presence of other users, each user do an API call, stressing the tenant server, or an user must make a login every time it expires and keep a browser instance open to poll presence data.
Both workarounds are deemed unsatisfactory by our clients.