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Failure to send MFA SMS during sign-in - error code 399287

victor vorobyov 20 Reputation points
2025-12-09T18:21:59.57+00:00

Error Code: 399287

Request Id: 1f9dd8ed-0802-43c8-8464-9916d90a4900

Correlation Id: a49f239c-e9a8-418b-a2f3-6d30d7b5f77c

Timestamp: 2025-12-09T17:20:57Z

@Raja Pothuraju

Microsoft Security | Microsoft Entra | Microsoft Entra ID
Answer accepted by question author
  1. Rukmini 12,000 Reputation points Microsoft External Staff Moderator
    2025-12-09T19:02:54.27+00:00

    Hello victor vorobyov,

    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 resolution was helpful, kindly take a moment to accept the answer and upvote it 👍 it as a token of appreciation.

    1 person found this answer helpful.
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  1. victor vorobyov 20 Reputation points
    2025-12-09T19:14:17.91+00:00

    Thank You very much

    0 comments

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