Hello
I’m Adeyemi and I’d be happy to help you with your question.
I understand that you're experiencing an error 2002 with your Microsoft 365 email account on your iPhone. This issue could be due to several reasons. It might be related to sign-in issues or it could be a problem with the application or device you are using to send and receive emails⁸.
One of the common solutions is to restart your device. You can also verify if Single Sign-On (SSO) isn't working or if there's another sign-in issue. If you're using a USB cable, make sure to use the one that came with your device or try a different Apple USB cable. Switching to a different USB port on your computer or even a different computer might also help.
Another solution is to log into the Microsoft Azure User Management Portal, select the affected user, go to the Authentication Methods page, and select "Require Re-Register MFA". This will remove their phone number and force them to set up Multi-Factor Authentication (MFA) again.
If your organization has configured a Conditional Access policy that prevents access to the application from iOS devices, you might need to modify the corresponding policy.
Lastly, you can try updating your Outlook to the latest version or creating a new profile and adding your account to the new profile.
I hope this helps.
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Kind regards,
Adeyemi