Resolving Base Url of Ad B2c user register flow.

Question

Resolving Base Url of Ad B2c user register flow.

Rohit Mishra 20

WARNING! There was an error parsing the document

Hello, I  have created a User register flow in azure AD B2C, and when running that flow it redirects me to my localhost with access_token & all. But in in url I am getting "#" instead of "?".  So I want suggestions how to resolve this.
Below I am attaching few Screen Shots.  
**ss1.  Register flow**  
![User's image](/api/attachments/990f3318-566b-42ee-b46e-652e7014ba4f?platform=QnA)

  
 **ss2. Url contains "#" instead "?".**  
In the below image in URL after sign-in I want "?" instead  "#".  
  
![User's image](/api/attachments/0bbb8233-b4f6-4063-b03a-99fa32c867b2?platform=QnA)

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Answer 1

Alfredo Revilla - Upwork Top Talent | IAM SWE SWA 27,526 Moderator

Hello @Deepanshu katara , by default Single-page application sign-in using the OAuth 2.0 implicit flow in Azure Active Directory B2C will follow the response_mode=fragment query parameter and use # as response delimiter. If you want to use ? as response delimiter you need to set the response_mode query parameter to query. Eg.

GET https://{tenant}.b2clogin.com/{tenant}.onmicrosoft.com/{policy}/oauth2/v2.0/authorize?
client_id=90c0fe63-bcf2-44d5-8fb7-b8bbc0b29dc6
&response_type=id_token+token
&redirect_uri=https%3A%2F%2Faadb2cplayground.azurewebsites.net%2F
&response_mode=query &scope=openid%20offline_access &state=arbitrary_data_you_can_receive_in_the_response
&nonce=12345

This also applies to the way you want to delimit the OAuth 2.0 authorization code flow in Azure Active Directory B2C response as documented in Get an authorization code.

Let us know if you need additional assistance. If the answer was helpful, please accept it and rate it so that others facing a similar issue can easily find a solution.

Rohit Mishra 20 Reputation points

2024-01-23T13:02:48.9066667+00:00

Thanks, Alfredo it helps to resolve my issue.
Alfredo Revilla - Upwork Top Talent | IAM SWE SWA 27,526 Reputation points Moderator

2024-01-26T05:55:11.35+00:00

Thanks for your question and for accepting my answer Rohit. Please also rate it. It will help us provide a better experience. Let me know if you need any additional help!

Answer 2

Deepanshu katara 16,720 MVP Moderator

Hi Rohit , As a pre-requisite for using a B2C User Flow, you'll need to Register a web application in Azure Active Directory B2C and Enable ID token implicit grant. Once you've created your application, you can go back to your user flow, select the application, reply URL, and run the flow. Below Img for ref User's image

If you have any other questions, please let me know. Thank you for your time and patience throughout this issue.

Please remember to "Accept Answer" if any answer/reply helped, so that others in the community facing similar issues can easily find the solution.

Deepanshu katara 16,720 Reputation points MVP Moderator

2024-01-18T13:22:59.2133333+00:00

@Rohit, Following up to see if the provided answer was helpful. If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.
Rohit Mishra 20 Reputation points

2024-01-19T09:20:40.7666667+00:00

Hi Deepanshu, I am doing the same thing but still getting "#" in my URL.

so here you can see after "https://jwt.ms/" I am getting "#" instead I have to get "?".

ss1. My user flow

SS2. Output Url
Deepanshu katara 16,720 Reputation points MVP Moderator

2024-01-19T10:14:09.7566667+00:00
Hi Rohit , Authorization Code Flow: Confirm that you are indeed using the Authorization Code Flow in your authentication request. This typically involves setting the response_type parameter to "code." Example:

response_type=code

Please go through this doc for more understanding https://learn.microsoft.com/en-us/azure/active-directory-b2c/access-tokens
Deepanshu katara 16,720 Reputation points MVP Moderator

2024-01-22T04:45:56.7333333+00:00

Hello Rohit, by default Single-page application sign-in using the OAuth 2.0 implicit flow in Azure Active Directory B2C will follow the response_mode=fragment query parameter and use # as response delimiter. If you want to use ? as response delimiter you need to set the response_mode query parameter to query. Please check below Alfredo comment for more details

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Resolving Base Url of Ad B2c user register flow.

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If you have any other questions, please let me know. Thank you for your time and patience throughout this issue.

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