Failing to get Azure AD B2C successfully configured for PoC - AppDataPortalBusProvider.cs access denied

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Posted on by AlluviaKRob

I followed B2C setup guidance from:

https://docs.microsoft.com/en-us/powerapps/maker/portals/configure/configure-openid-settings

https://readyxrm.blog/2019/07/24/configure-azure-ad-b2c-for-powerapps-portals/

In Chrome browser, I see an HTTP Error 401 after hitting the sign in button

URL: https://lgps01.powerappsportals.com/Account/Login/ExternalLogin?returnUrl=%2F&provider=https%3A%2F%2Falluviatechb2c.b2clogin.com%2Ftfp%2FAlluviaTechB2C.onmicrosoft.com%2FB2C_1_signupsigninportal%2Fv2.0%2F

After enabling diagnostic logging, I discovered the following message:

RequestData:, RequestPath:, RequestExtension:, SessionId:, UserId:, CorrelationId:00000000-0000-0000-0000-000000000000, Elapsed:0, RequestMethod:, RequestContentType:, RequestAccept:, RequestCacheControl:, UserAgent:, HandlerName:, HandlerExecuted:False, VaryByCustom:, MemberName:OnSubscriptionErrorAsync, SourceFilePath:G:\Agents\BA1256\_wap\143\s\Framework\Adxstudio.Xrm\AspNet\PortalBus\AppDataPortalBusProvider.cs, SourceLineNumber:150, ExceptionMessage:Access is denied

I tried searching the internet, but have not been able to uncover any clues for next steps. Can anyone help?

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Power Apps portals

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AlluviaKRob 13 on at

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Furthermore, when I Run User Flow from Azure AD B2C tenant it runs successfully (registering a new user) until right after entering the new password. Then it tries to redirect back to the PowerApps Portal and fails with "Page not found" error. I checked Azure AD B2C and the user is there, but the Profile says "Unknown".

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Sandeep Dhanrajani Microsoft Employee on at

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Can you re-check your site settings as per the documentation especially the value for Authentication/OpenIdConnect/[Federation-Name]/Authority setting? Your issue seems similar to the one reported in the forum (See the post and solution provided in the post there)

Specifically steps for this particular configuration are described in detail in the section "Sign up and Sign In user flow" in the blog here

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AlluviaKRob 13 on at

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I updated Authority setting and on the RedirectURI, I changed suffix "signin-B2C" to "signin" and the issue is resolved. Thanks!

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Sandeep Dhanrajani Microsoft Employee on at

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Glad it worked!

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Community Power Pla... Microsoft Employee on at

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I'm getting the same issue, On the user flow in B2C when I run it, it go through the registration and register the user but redirect to myportal.powerappsportals.com/signin-AAD-B2C_1 and land on page not found error. How to fix this? how can i get page redirect to the profile page?

Thanks,
-la

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Community Power Pla... Microsoft Employee on at

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@Anonymous have you tried setting up the login page, web templates and site setting as mentioned here?
I guess you need to set up custom page.

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Community Power Pla... Microsoft Employee on at

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Hi, I'm able to do it.

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