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Outlook for Mac stopped sync with Exchange, creating new account creds error where Webmail works

Wilfried Van Haeren 5 Reputation points
2024-03-19T14:12:45.5166667+00:00

A user called in that her Outlook for Mac stopped syncing at 9:20 am. Her iPhone and webmail work well. We removed the account in Outlook for Mac and tried to add a new (and only account). It failed with a credential error and an invalid user. It doesn't even show the MS password window.

Webmail/outlook.com works online as well as on the phone.

Creating an Apple Mail also works (although with cert errors).

Latest macOS, latest O365 Outlook (March 18, 2024)

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  1. Wilfried Van Haeren 5 Reputation points
    2024-03-21T15:47:07.8433333+00:00

    The switch to the new Outlook (eventually) worked. The day before, the same switch from legacy to new didn't show errors. I tried again, and everything is working. Thank you all for the supporting responses.

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  2. ChristyZhang-MSFT 22,336 Reputation points Microsoft Vendor
    2024-03-25T06:36:59.8233333+00:00

    Hi @Wilfried Van Haeren ,

    Thanks for your reply!

    As reminded by Alexis Haritian, I found this issue related to EX742767:

    User's image

    If you are the administrator of your organization, you can log in to admin center>heat to check it. Please wait patiently and i will post back if there're any updates.

    Thanks for your kindly understanding and support!

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