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Phone number has bad reputation

Tuan Manh Duong 0 Reputation points
2025-12-04T04:23:05.7733333+00:00

Hello everyone,

Right now our customer is having an issue regarding the phone number while he tried to register our app.

The error was throw with message:

Phone number has bad reputation - +41 xx xxx xx xx

This issue occurred several times in the past when Microsoft updated their policy and now it happens again. Do we have any way to resolve this?

Microsoft Security | Microsoft Entra | Microsoft Entra ID
Answer accepted by question author
  1. Sridevi Machavarapu 8,925 Reputation points Microsoft External Staff Moderator
    2025-12-04T04:30:10.9633333+00:00

    Hello Tuan Manh Duong,

    Thank you for sharing your details (user's email address, tenant id, phone number, country code and country) with us over Private Message.

    I have reached out to the engineering team to unblock MFA for your account. They have now unblocked it from the backend and removed the bad reputation on it. You should be able to log in to the Azure Portal without any issues.

    Please try logging in and check if you can complete SMS authentication without any errors. Let me know if you encounter any issues.

    I hope this information is helpful. Please feel free to reach out if you have any further questions.

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

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