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Authentication not working

Denise Thomas 0 Reputation points
2026-01-05T20:28:33.5666667+00:00

trying to sign into Microsoft account emails but the authentication is not working.

Outlook | Outlook for mobile | Outlook for iOS | For home
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  1. Winnie-B 7,765 Reputation points Microsoft External Staff Moderator
    2026-01-07T07:43:17.1666667+00:00

    Good day Denise Thomas, I hope you're well. May I know if you've got any chance to check my reply? If you have any further updates on this issue, please feel free to reach back. I'm happy to help you.

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  2. Winnie-B 7,765 Reputation points Microsoft External Staff Moderator
    2026-01-06T02:29:17.82+00:00

    Hello Denise Thomas

    Thank you for reaching out to Microsoft Q&A Forum. I understand how frustrating it is when authentication fails and prevents you from accessing your Microsoft account emails on your iOS device.

    To help you effectively, could you clarify which authentication issue are you experiencing specifically? For example:

    • Are you entering your password correctly but not receiving the verification code (via SMS, email, or authenticator app)?
    • Are you receiving the code but it's being rejected as incorrect or expired?

    If I have misunderstood your situation, please don't hesitate to clarify, and I will adjust my recommendations accordingly.

    In the meantime, please try these steps:

    1. Try signing in via web browser first

    • Sign in to Outlook on the web and see if authentication works
    • If it works there, the mobile app issue is app-specific

    2. Update Outlook for iOS

    • Go to the App Store and update Microsoft Outlook to the latest version.
    • Go to Outlook, remove your email account and add it back again.

    3. Clear Outlook app cache: Delete and reinstall the Outlook app from the App Store then sign in again. 

    4. Try "Sign in another way"

    • When prompted for authentication, look for "Sign in another way" or "Use a different verification method"
    • Try an alternative method (email code instead of SMS, etc.)

    5. Check your verification methods:

    For more details, you can see these official sources:

    Please let me know the exact error message you're seeing, this will help me provide specific troubleshooting steps.


    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".    

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