Azure B2C Custom Policies OpenID Connect error

Question

Hi,

I'm trying to set up Azure B2C Custom Policy to integrate with an OpenID IDP.
I set up all but getting the attached error.

the same IDP is working fine when used through the standard userFlows.

Answer 1

Hello @Pellegatti Andrea · Thank you for reaching out.

By tracking the request id, I found that the Reply URL in the authentication request is:

https://repxxxxc.b2clogin.com/repxxxxc.onmicrosoft.com/b2c_1a_rossxxxxp_sxxxxn/oauth2/authresp  

However, the Reply URLs (Redirect URIs) registered on the application: 65c44291-xxxx-xxxx-xxxx-ac1bcc6d5e26 are:

https://repxxxxc.b2clogin.com/repxxxxc.onmicrosoft.com/oauth2/authresp  
https://repxxxxxxxxxxxxxxes.b2clogin.com/repxxxxxxxxxxxxxxes.onmicrosoft.com/oauth2/authresp  

To resolve the issue, make sure that the Reply URL in the authentication request is added to the application: 65c44291-xxxx-xxxx-xxxx-ac1bcc6d5e26.

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