b2clogin.com not working as redirect URI

[PaoloCastAway]

I followed the instructions on this page, but https://your--B2C-tenant-name.b2clogin.com/your-B2C-tenant-name.onmicrosoft.com/oauth2/authresp doesn't work as Redirect URI: after successful authentication, I get "AADSTS50011: The reply url specified in the request does not match the reply urls configured for the application".
To make it work, I have to use https://login.microsoftonline.com/te/your-B2C-tenant-name.onmicrosoft.com/oauth2/authresp (please note the "te" segment in the URL)

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Document Details

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• ID: bac6db2d-bff9-cbcf-d522-966ed17ea27f
• Version Independent ID: 91e3eeb7-8602-9e26-21c3-1fa70d03a354
• Content: Set up sign-in for an Azure Active Directory organization - Azure Active Directory B2C
• Content Source: articles/active-directory-b2c/active-directory-b2c-setup-oidc-azure-active-directory.md
• Service: active-directory
• Sub-service: b2c
• GitHub Login: @mmacy
• Microsoft Alias: marsma

[frankhu-2021]

@PaoloCastAway Thanks for your feedback! We will investigate and update as appropriate.

[frankhu-2021]

@PaoloCastAway the reply URL is whatever the reply url you include in the parameter URL. So the issue is that you're sending the "te" in your request when logging in. Can you please double check that you have the correct reply url configured in the parameters of your request?

[frankhu-2021]

@PaoloCastAway As there hasn't been a response in quite some time I will be closing out this github issue, please reopen the issue and let us know if you have anymore questions.
Thanks!

[PaoloCastAway]

Well, I think I didn't make myself understood. @FrankHu-MSFT, I beg your pardon. Let me try to give a better explanation.

So: in the context of this document, "application" is not something I'm developing, the "application" role is played by B2C. In order to accept identities from a plain Azure AD Tenant (by means of OpenID Connect), B2C needs us to create an App Registration in the target Azure AD Tenant . So, the reply URL is not emitted by my application, nor by my code; it's emitted by B2C itself, and as a dev I've no control on this URL. So, I had to sniff the actual Reply URL built by B2C when it's performing the OpenID Connect flow, and this Reply URL was not shaped as https://your-B2C-tenant-name.b2clogin.com/your-B2C-tenant-name.onmicrosoft.com/oauth2/authresp, on the contrary it's shaped as https://login.microsoftonline.com/te/your-B2C-tenant-name.onmicrosoft.com/oauth2/authresp

Anyway, this happened in July '19. Today (Sep '19) the https://your-B2C-tenant-name.b2clogin.com/your-B2C-tenant-name.onmicrosoft.com/oauth2/authresp is working fine, so the document is now aligned with the actual behavior. Thanks