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.
Hi Darrell
I think you are replying to a deleted comment. 🙂
In this forum they say it will be available in a preview late november:
https://feedbackportal.microsoft.com/feedback/forum/ebe2edae-97d1-ec11-a7b5-0022481f3c80
Have a nice day.