Outlook and OneNote continually prompts for password when they try connect to office 365

Byungkook 21 Reputation points
2022-10-20T16:06:31.927+00:00

I have no problem signing into office365 web but outlook and OneNote ask for password endlessly

This started today suddenly. no new software was installed.

I have Microsoft 365 Apps for Enterprise -en-us on Windows 10

MS 365 Version 16.0.15629.20208
Windows 10 Version 10.0.19043.1889

I performed following but no luck.

-Reset the outlook profile, (Deleted profile from registry also.)
-Wiped C:\Users\User\AppData\Local\Microsoft\Outlook\ folder
-Reinstalled office 365,
-Deleted office 365 credentials from Credential manager
-Followed instruction from below URL.
https://video2.skills-academy.com/en-us/outlook/troubleshoot/authentication/continually-prompts-password-office-365
I downloaded and launch the diagnostic tool "Diag: Outlook keeps asking for my password"
I got "system settings look fine" Result

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Windows 10
Windows 10
A Microsoft operating system that runs on personal computers and tablets.
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OneNote Management
OneNote Management
OneNote: A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.Management: The act or process of organizing, handling, directing or controlling something.
177 questions
Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
4,519 questions
Accepted answer
  1. DamTech 76 Reputation points
    2022-10-31T12:26:53.307+00:00

    I have tested every MS solution.. tools etc. This fixed my issue

    1. Open the Regedit application as the client. (This should not be done as admin as it will apply the changes to your profile instead of the client's settings.)
    2. Go to “Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity.”
    3. Verify if there is a DWORD value named “EnableADAL” that is set to 0. (If “EnableADAL” is not found in the registry, skip to step 6.)
    4. Update the DWORD value for “EnableADAL” to 1.
    5. Select OK.
    6. Verify if there is a DWORD value named “DisableADALatopWAMOverride” that is set to 1. (If the DWORD value for “DisableADALatopWAMOverride” is set to 0, skip to step 9.)
    7. Update the DWORD value for “DisableADALatopWAMOverride” to 0.
    8. Select OK.
    9. Close Regedit. 10. Open Outlook and sign-in.

    Source: https://confluence.som.yale.edu/display/SC/Outlook+Modern+Authentication+Registry+Setting

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  1. Richard 1 Reputation point
    2022-10-27T13:25:37.677+00:00

    Hi,

    Same problem here since today.
    How to force Outlook to ask credentials from modern authentication ? Even after deleting Outlook profile it continues to ask password with legacy authentication.
    If I try to a new Windows profile I can configure the mailbox with Modern Authentication.

    I don't want to delete user windows profil.

    Modern authentication is enabled on 365 admin console.

    Regards,

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