iCloud for Windows 13 can not sign in and setup connection Outlook 365 since November 2021 update

I am unable to sign in to iCloud through iCloud for Windows.

The Error is "Verification Failed" "An unknown error occurred." after I provided a correct password and 2FA passcode. It provided a retry option and a cancel button.


The option checked are iCloud Drive and "Mail, Contacts, and Calendars" with Outlook.

I tried to force quit it and iCloud Drive was successfully updated and it prompted updated 2minutes ago at the bottom right. But I can't find any account setup in Outlook.


I tried clean reinstall Office 365 with a clean Outlook profile. A clean reinstall of iCloud for Windows from Microsoft Store. But no luck.


My account works with another Windows 10 pro computer and iCloud for Windows 13. So it should not be my account/ credentials problem.


I roll back to version 12 without the "passwords" option that will set up my account in O365 and everything will work fine. But I want to keep the apps updated and secure.


Any suggestion would be great, thanks.



Windows, Windows 6

Posted on Dec 8, 2021 8:57 PM

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3 replies

Dec 9, 2021 3:28 PM in response to Rafe_L

Hello Rafe_L,


Welcome to Apple Support Communities!


It appears there is an error when you attempt to log in to iCloud on your PC. We'd like to assist.


To confirm, have you updated the Windows software and updated iCloud for Windows 13? This would be the best step to resolve these types of issues with verifications. Updating is the best way to keep your data secure.

Update Windows

Download iCloud for Windows - Apple Support


If you're continuing to experience the same error, use these steps: If you can't connect to the App Store, iTunes Store, or other Apple services

As the error occurs when attempting to connect to Apple servers, this will provide several steps to help fix this.


Take care.

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iCloud for Windows 13 can not sign in and setup connection Outlook 365 since November 2021 update

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