Getting Error "The phone number you provided is unreachable." in Azure AD B2C custom policy.

Question

I am getting error during the phone number verification process, after clicking "Send Code" I received the error message "The phone number you provided is unreachable".

Thanks,

Answer 1

Hi,

via

https://learn.microsoft.com/en-us/answers/questions/2105241/the-error-the-phone-number-you-provided-is-unreach

The behavior you're encountering where the phone number verification process results in an error after repeatedly clicking "Send a New Code" is generally a safeguard to prevent abuse or excessive requests, which can be seen as a form of rate limiting.

In Azure AD B2C, there are built-in mechanisms to prevent abuse of the phone verification process, such as limiting the number of verification codes that can be sent in a short period. This helps to prevent potential denial-of-service attacks or abuse of the phone verification service.

You could implement a countdown timer that disables the "Send a New Code" button for a certain duration after each request. For example:

JavaScriptCopy

document

Please let me know if you have any questions and I can help you further.

If this answer helps you please mark "Accept Answer" so other users can reference it.

Thank you,

James