Microsoft B2C - Unified signup v2.1.22 - Raise CAPTCHA API error

Question

Microsoft B2C - Unified signup v2.1.22 - Raise CAPTCHA API error

Simoneau, Marc 5

When a user try to Sign up and successfully pass the first verifications with "CAPTCHA" and the email "Verification code". The user can press "Change e-mail". Once press the CAPTCHA raise the error "Api error on captcha control" and the user is stuck. Is a new version comming soon?

Bandela Siri Chandana 3,055 Reputation points Microsoft External Staff Moderator

2025-04-24T23:13:42.3066667+00:00

Hi @Simoneau, Marc
I understand that you have successfully pass the first verifications with "CAPTCHA" and the email "Verification code" and when you press on "Change e-mail". Once you press the CAPTCHA it raises the error "Api error on captcha control" and the user is stuck.

Try to Update the page contract from "Unified signup v2.1.22" to "self-asserted: 2.1.33" page layout version and check whether you are facing same error.

For further reference: https://learn.microsoft.com/en-us/azure/active-directory-b2c/add-captcha?pivots=b2c-custom-policy#update-content-definitions-page-layouts

Hope this helps. Do let us know if you have any further queries.
Simoneau, Marc 5 Reputation points

2025-04-25T12:58:45.39+00:00

Hi @Bandela Siri Chandana

Thanks for the fast reply.

I've try your recommandation in the custom policies and in the normal User flows. Still getting the same API error.

If I can provide you more info, in the Audits Logs, this error raise a "Failed" Status with "The challenge has already been verified."
Bandela Siri Chandana 3,055 Reputation points Microsoft External Staff Moderator

2025-04-25T23:38:03.4133333+00:00

Hi @Simoneau, Marc
It seems you are trying to split Email verification. So, follow the document samples/policies/split-email-verification-and-signup/policy/SignUpOrSignIn_SplitEmailVerificationAndSignUp.xml at master · azure-ad-b2c/samples · GitHub and check whether you have achieved it.
Hope this helps. Do let us know if you have any further queries.
Bandela Siri Chandana 3,055 Reputation points Microsoft External Staff Moderator

2025-04-28T19:14:29.88+00:00

Hi @Simoneau, Marc
Just checking in to see if above information was helpful. If you have any further updates on this issue, please feel free to post back.
Simoneau, Marc 5 Reputation points

2025-04-29T12:52:39.2733333+00:00

Hi @Bandela Siri Chandana

The problem is in the basic "User flows" with no specials configurations other then the version 2.1.22 in the drop-down list.

I understand your proposition for the Custom policies, but we are not there at all.

This error was not in the version 2.1.20.
Bandela Siri Chandana 3,055 Reputation points Microsoft External Staff Moderator

2025-05-06T16:47:06.92+00:00

Hi @Simoneau, Marc
Thanks for your response, working on it, we will update you.
Bandela Siri Chandana 3,055 Reputation points Microsoft External Staff Moderator

2025-05-08T10:08:27.13+00:00

Hi @Simoneau, Marc
Sorry for delay, thank you for your patience.
I have done repro of this scenario everything works fine from my end with version v2.1.22 and also changed email. We need to check from your end so please provide the step-by-step configuration details of user flow and error screenshots in the private message, so that we can discuss in detail for further troubleshooting.
Simoneau, Marc 5 Reputation points

2025-06-19T16:03:41.6966667+00:00

Hi @Bandela Siri Chandana
Last time we talk it look like it was an API Error from emails with special caracters in like "+".
Any update on that?
Bandela Siri Chandana 3,055 Reputation points Microsoft External Staff Moderator

2025-06-23T10:46:28.13+00:00

Hi @Simoneau, Marc
Can you please check the behavior without using special characters in email and update and I have done repro of this scenario everything works fine from my end with version v2.1.3 and also changed email.

Hope this helps. Do let us know if you have any further queries.