'We are working on universal app support for M1 Macs and will share more news as our work progresses.' Microsoft 'Teams is currently available in Rosetta emulation mode on Macs with M1 and the browser,' wrote Bill Doll, a senior product marketing manager, in a post to a Microsoft blog.

Teams, the Office most aggressively promoted by Microsoft this year, has yet to appear in a Universal App edition for M1 Macs. Alternately, users can choose App Store from the Apple menu, then select Updates, or from an Office application, pick Check for Updates from its Help menu. Users with automatic updates enabled will start to receive the M1-native apps today. (If all this sounds vaguely familiar to long-time Mac users, it should: The initial iterations of Rosetta and Universal Apps debuted in 2006 with OS X Tiger, to run applications written for the PowerPC processor on then-new Intel-based Macs.) To eliminate confusion, developers can packages both the native and Intel versions of an app into a single binary, called a Universal App. On the other hand, native applications do not require such translation and thus launch faster than Intel apps. Rather than translate the code again and again each time the application is launched, Rosetta 2 does the translation once, prior to the first time the app is run, then stores the translated code for subsequent use.

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