Azure AD B2C custom policy Sign In issue

Abhijit Banke 0

I am trying to add custom policy in Azure AD B2C

Sign In not working with custom policy but same user I am trying to sign in with User flow policy it is working fine.

Using Custom policy flow - Getting validation message Invalid user ID or Password

Abhijit Banke 0 Reputation points

2026-03-12T08:00:13.64+00:00

Verified all mentioned points. All are correct.

What I noticed is.
Upon sign in button click getting validation message on front end : Invalid username or password.

Same time I checked Sign In logs, status is Success.
Rukmini 36,140 Reputation points Microsoft External Staff Moderator

2026-03-18T19:32:51.32+00:00
Hello Abhijit Banke

This occurs when you successfully log in but your custom policy in Microsoft Entra External ID does not return claims to the user interface.

To resolve the issue, try the below:

In login-NonInteractive, Make sure it returns required claims:

<OutputClaims>

And in SelfAsserted TP (SignIn page) Ensure validation is wired correctly:

<ValidationTechnicalProfiles>

Make sure to add the metadata

<Item Key="RaiseErrorIfClaimsPrincipalDoesNotExist">true</Item>

Check Orchestration Step After login , make sure the flow continues:

<OrchestrationStep Order="2" Type="ClaimsExchange">

Let me know if any further queries - feel free to reach out!
Rukmini 36,140 Reputation points Microsoft External Staff Moderator

2026-03-19T20:31:22.56+00:00

Hello Abhijit Banke

Following up to see if the above provided information was helpful. If you have any further queries do let us know.

1 answer

RoryB 540 Reputation points

2026-03-18T22:06:05.3466667+00:00

Do other custom policies work?

If this is a new installation, this error is sometimes because B2C has not been set up correctly.

https://learn.microsoft.com/en-us/azure/active-directory-b2c/tutorial-create-user-flows?pivots=b2c-custom-policy

There is a tool to do this:

https://b2ciefsetupapp.azurewebsites.net/

The other reason is that the "login-NonInteractive" technical policy in the extension file is not configured correctly.

https://learn.microsoft.com/en-us/azure/active-directory-b2c/tutorial-create-user-flows?pivots=b2c-custom-policy#add-application-ids-to-the-custom-policy
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