AADB2C90047 error for 1 user only.

David Escolme 1 Reputation point

We are using custom policies in an azure adb2c sign in flow. We are using custom UI with no custom/client side scripting. We have configured CORS on the underlying storage account and all seems well for every user except 1 who complains that they cannot login to the application we are protecting with AADB2C. We passed them a test flow url and the response they received was the AADB2C90047: The Resource ... contains scripts.... etc....looking at docs that points to CORS but every other user is logging in fine...........Is there anywhere else we could look? This user can login from their home PC but can't from their work pc/network.

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Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
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  1. James Hamil 22,886 Reputation points Microsoft Employee

    Hi @David Escolme , what troubleshooting have you done for this? The error could be caused by a variety of different issues. For example you may need to allow script execution or change the CORS configuration. Please let me know which steps you've tried and I can narrow down a solution for you.


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  2. David Escolme 1 Reputation point

    Hi, @James Hamil thanks for the reply, we have upwards of 2000 users logging in fine with this flow from a variety of home and office networks and different devices. It's just that we have 1 user reporting that when they attempt to login from their office network, they can't.

    On a troubleshooting call, we noticed that the they get ERR_CONNNECTION_CLOSED when the login page tries to load in the custom UI page and we have a follow up call with them scheduled where we'll be able to gather more information from their browser.

    It doesn't seem like a general CORS or script execution thing as we only have this one report of an issue and only from this user's office network.

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  3. DisplayName-3010 131 Reputation points

    Hi @David Escolme ,

    Is any other of your users logging in from the same network? Maybe the proxy or a firewall of the office network might interfere with the setting, or the user might have javascipt disabled in his browser. This are options of where such an error could originate.

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