Unable to authenticate with Apple Mail. Mac Calendar and Fantastical.

Shalgum 1 Reputation point
2022-07-20T16:39:40.057+00:00

We recieve an error when attempting to authenticate and login to Apple Mail on any mac regardless of OS. Webmail and outlook function without issue.
Error received: The operation couldn't be completed. (Com.apple.accounts error 3). We have MFA activated and that error occurs almost immediately after mfa authentication.

Microsoft Exchange
Microsoft Exchange
Microsoft messaging and collaboration software.
444 questions
Windows 10 Security
Windows 10 Security
Windows 10: A Microsoft operating system that runs on personal computers and tablets.Security: The precautions taken to guard against crime, attack, sabotage, espionage, or another threat.
2,820 questions

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  1. Aholic Liang-MSFT 13,826 Reputation points Microsoft Vendor
    2022-07-21T03:40:28.353+00:00

    Hi @Shalgum ,
    Would you have a try and see if the Exchange account can be configured properly in Outlook for Mac or in Outlook Web App?
    To help narrow down the issue, it's suggested to try adding a different account (outlook.com , gmail.com) to the Apple Mail on Mac and see if the error persists.

    Besides, here is a similar thread resolve the same error by subscribing the ICS link, , which you can refer to: com.apple.account error 3 - Microsoft Q&A

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    1 person found this answer helpful.