Performance on MS Teams was very bad on M1 MacBooks compared to other applications. But Microsoft is working on a native osx-arm64 version which I installed. And I have to say that I am blown away from the speed improvement. It’s like day and night. If you’re interesting in trying out non released Teams versions you can find download links under https://raw.githubusercontent.com/ItzLevvie/MicrosoftTeams-msinternal/master/defconfig. While writing this article the preview builds included a version for “osx-x64 + osx-arm64”. The links are not clickable but you can copy paste them into your browser to download the installer.