Invalid redirect uri error - possible missing step

[DonalSlemon]

Running the sample using a personal account - i.e. with 'Tenant' set to 'common'

When running the sample app, after following the steps in the Readme the error 'Error Acquiring Token Silently:
MSAL.Desktop.4.55.0.0.MsalServiceException:
ErrorCode: WAM_provider_error_3399614473
Microsoft.Identity.Client.MsalServiceException: WAM Error
Error Code: 3399614473
Error Message: ApiContractViolation
WAM Error Message: (pii)
Internal Error Code: 557973642' is returned.

The detail of this is: '**Possible causes:

• Invalid redirect uri - ensure you have configured the following url in the application registration in Azure Portal: ms-appx-web://microsoft.aad.brokerplugin/00000000-bcbc-0000-dede-s8s8s8s8s8s8**' (dummy GUID replaces actual ClientID).

Resolution:
Adding this as an additional Redirect URI (i.e. in addition to 'https://login.microsoftonline.com/common/oauth2/nativeclient') resolves the error.

I'd suggest the readme be amended to include this step for the scenario where applicable.

[rickyno]

I know this is an old issue but the actual root error is that the RedirectUri is case-sensitive and Microsoft is always showing it as lowercase, but that's incorrect. I had the same error stating the RedirectUri needed to be configured in the app registration, but it was already there, or so I thought.

I managed to get a popup showing me the Redirect Uri and noticed capitalized letters in it, then I found this page stating "Redirect URIs are case-sensitive and must match the case of the URL path of your running application."

I thus changed the RedirectUri from
ms-appx-web://microsoft.aad.brokerplugin/00000000-0000-0000-0000-000000000000
to
ms-appx-web://Microsoft.AAD.BrokerPlugin/00000000-0000-0000-0000-000000000000
(using the Application (client) ID for the guid) and that solved the problem, no need to add the common-oauth-nativeclient uri.

Big F from Microsoft to not be clear on this case-sensitivity in ANY of the samples... Let people waste hours not understanding why following guides step by step doesn't work.