Outlook authentication error for one user on Mac

Mac OS 26.4. Outlook gives an error when I try to add my account. Authentication error occured while configuring account. Outlook works okay with a different user account on the same mac. I have uninstalled Outlook and reinstalled it several times.

iMac (M1, 2021)

Posted on Mar 31, 2026 8:00 AM

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Outlook authentication error for one user on Mac

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