Microsoft 365 admin center - Unable to login by verifying using SMS

Question

Good morning!

We're unable to log into our Microsoft 365 tenant's Admin Center because verifying using SMS is not working. The system claims the account is not verified but doesn't allow any other options (error Code 399287).

I found in a few other post this can be solved by the engineering team, so I'm tagging the person from Microsoft that was able to get this fixed: @Raja Pothuraju , could you do the same for me?

Kind regards,

Phill H

Answer 1

Hello Phill Hayman,

Thank you for sharing your details 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.

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