Azure B2C Postman OAuth 2.0 - Implicit Grant - invalid_request

1
votes

I have Postman set up following this guide:

https://docs.microsoft.com/en-us/aspnet/core/security/authentication/azure-ad-b2c-webapi?view=aspnetcore-2.2#use-postman-to-get-a-token-and-test-the-api

When I attempt to get new Access Token, Postman prompts a window with my B2C Sign in page.

I then attempt to sign in, however receive the following error in Postman: Error invalid_request

There is no other additional details. I feel I've followed the guide exactly.

What am I missing here?

enter image description here

1
postmanazure-ad-b2c
Hi @aherrick Does the callback URL in the Postman window match the reply URL for the application registration in the Azure AD B2C tenant? – Chris Padgett
@ChrisPadgett thanks for the response. Yes the callback URL is one of a few different URLs I have registered under the app. I’ve tried a few of them and they all fail – aherrick
I tried on my side, it works well. Have you checked your Scope if it has the right api id uri? – SunnySun
Hi @aherrick, did you ever find a resolution to this or what was causing the issue? I'm experiencing exactly the same problem. – English Dave

1 Answers

1
votes

In the request, you need to make sure the callback url same with your app reply url and api id uri of the Scope same with your API in the B2C.

The request is:

enter image description here

And the result like this:

enter image description here