The app on Android and macOS starts very slow.
Please fix startup time. It takes "years" to start the app and to be able to make a call.
Håvard Pedersen commented
I have 10 applications in my dock that I start after my computer has booted. This includes heavy-weighters like Safari with 5 windows and multiple tabs as well as my mail client and iTunes. Still, Microsoft Teams is the last app to launch, over 5 seconds after every single one of the other apps are done starting.