Why does my Azure AD B2C go into infinite loop on login (localhost)

Lou's World Inc 41

Followed tutorial (below) to set up a .Net 8 MVC app with an Azure AD B2C signin page. Using a new tenant with user flows. When I test the user flow with reply url, jwt.ms, a token is created. However, when I attempt to test login locally (https://localhost:1234/) the browser gets stuck in an infinite loop. I've tried logging in in private window (incognito)

https://learn.microsoft.com/en-us/aspnet/core/security/authentication/azure-ad-b2c?view=aspnetcore-8.0

@alfredorevilla-msft

Marilee Turscak-MSFT 34,546 Reputation points Microsoft Employee

2024-05-09T22:53:26.2366667+00:00

@Lou's World Inc Which browser is having the issue and when did it start? Is your account the only one having this problem?
Lou's World Inc 41 Reputation points

2024-05-10T09:42:03.0366667+00:00

I've tried in Firefox (125.03) and Chrome (Version 124). It has never worked, since creating the app (4 days)
Lou's World Inc 41 Reputation points

2024-05-10T09:52:25.04+00:00

I've tried in Firefox (125) and Chrome (124). It has never worked (5 days). I don't know if other accounts are having this issue.
James Hamil 22,186 Reputation points Microsoft Employee

2024-05-10T20:49:00.1666667+00:00

Hi @Lou's World Inc , one possible reason is that the redirect URI is not configured correctly. Please make sure that the redirect URI in your application registration matches the redirect URI in your code.

Another possible reason is that the user flow is not configured correctly. Please make sure that the user flow is configured to return the correct claims and that the claims are mapped correctly in your code.

If the issue persists, you can try enabling logging in your application to get more information about what is happening during the login process.

If nothing here works please let me know and we can open a support ticket.

Best,

James
Lou's World Inc 41 Reputation points

2024-05-13T08:33:32.0666667+00:00

Thank you @JamesHamil, the problem is resolved. I believe the issue was the redirect URI.

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Why does my Azure AD B2C go into infinite loop on login (localhost)