Here’s the link. You need to select the Mac OS tab. Note also that the insider versions of Outlook for Mac (in the fast ring) offer a chance to try a new user interface that differs greatly from that of the production releases. However, the new user interface doesn’t yet offer all of the features of the old one, which is why it isn’t the default yet. You may wish to try it if you’re dissatisfied with the older version.

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Outlook for Mac works relatively well with Voiceover.

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