Microsoft Security | Microsoft Authenticator
A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation
MFA SMS verification blocked with "BadReputation" error
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(198.4, 7.000000000000001%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAM%3C/text%3E%3C/svg%3E)
Antonis Mavropsis
0
Reputation points
Hello,
My phone number has been marked as bad reputation and if I try to authenticate via text message I get an error. How can I solve this?
Correlation ID:c40efb9f-cca8-4f14-9fb7-f5255fe747ef. Timestamp:2025-10-24T08:55:02Z
Thanks,
Antonis
Microsoft Security | Microsoft Authenticator
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