This is in internal testing. I don’t have exact timing for you, but wanted to let you know it is coming!Gaëtan van der Laan supported this idea ·Gaëtan van der Laan commented
This is taking way too long (since september 2016)! The current version of Teams still doesn't provide the experience in Windows 10 as it should. Notifications are horrible as in inconsistent and sluggish. How about the Fluent Design System? Bring some consistency in this (but also other Microsoft's) software.
I cannot believe "this is still being worked upon". It has been two years already…
Please, what is the current status in 2019? :/