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yoelh's avatar
yoelh
Icon for Microsoft rankMicrosoft
Mar 17, 2023

Azure AD B2C authorization code and refresh token size increase update

Update September 11, 2023: This post is irrelevant anymore   As part of ongoing security improvement efforts in Azure Active Directory (AAD), part of Microsoft Entra, Azure AD B2C will be rolling...
Azure AD B2C
eschillercourtalert's avatar
eschillercourtalert
Copper Contributor
Apr 05, 2023

yoelh This change appears to broken all our Desktop applications that use MSAL .net (Microsoft.Identity.Client) to authenticate against our Azure B2C tenant. The .net exception our users are receiving is:

 

Exception: Microsoft.Identity.Client.MsalClientException
Message: The browser based authentication dialog failed to complete. Reason: The protocol is not known and no pluggable protocols have been entered that match.
Source: Microsoft.Identity.Client

  • User20230420's avatar
    User20230420
    Copper Contributor
    Apr 20, 2023

    eschillercourtalert Are you able to resolve this issue? Any update from Microsoft? We are facing the same issue with our Windows application. Thank you

    • eschillercourtalert's avatar
      eschillercourtalert
      Copper Contributor
      Apr 26, 2023

      User20230420 there were two things we did to address this issue:

       

      1) Opened a ticket with Microsoft, eventually they temporarily rolled back this change to my tenant. No word when the change will be permanently made

      2) Update the version of Microsoft.Identity.Client nuget package on the desktop application. This addressed the issue until Microsoft rolled back the change

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