Describe the bug

I see this was reported in #28226, but it was closed without resolution, and the problem definitely exists.

Following instructions here: https://docs.microsoft.com/en-us/aspnet/core/blazor/security/webassembly/additional-scenarios?view=aspnetcore-5.0#request-additional-access-tokens

You cannot request multiple tokens under .Net 5.0. The error received is:

Provided value for the input parameter scope is not valid because it contains more than one resource. Scope x y is not valid, where x and y are the scopes I am requesting.

If I request 1 scope only, I can authenticate with no errors.

I have an older blazor wasm application built against .Net Standard 2.1, which follows the same coding instructions/pattern where this does work.

To Reproduce

Program.cs is:

    public static async Task Main(string[] args)
    {
        var builder = WebAssemblyHostBuilder.CreateDefault(args);
        builder.RootComponents.Add<App>("#app");

        builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });

        builder.Services.AddMsalAuthentication(options =>
        {
            builder.Configuration.Bind("AzureAd", options.ProviderOptions.Authentication);
            options.ProviderOptions.DefaultAccessTokenScopes.Add("https://graph.microsoft.com/openid");
            options.ProviderOptions.AdditionalScopesToConsent.Add("https://management.azure.com/user_impersonation");
        });

        builder.Services.AddAuthorizationCore(options =>
        {
            options.AddPolicy("OneUser", policy => policy.RequireAssertion(context =>
                context.User.HasClaim(c =>
                c.Type == "preferred_username" &&
                c.Value == "x*x.onmicrosoft.com")
            ));
        });

        await builder.Build().RunAsync();
    }

It fails even without attempting token access. Index.razor does not really do much, only …

<AuthorizeView Policy="OneUser"> <Authorized> </Authorized> <Authorizing>

Authentication in progress

</Authorizing> <NotAuthorized>

Please log in with an authorized user

</NotAuthorized> </AuthorizeView>

Exceptions (if any)

The error/exception number is AADSTS28000

Further technical details

• ASP.NET Core version
• Include the output of dotnet --info
• The IDE (VS / VS Code/ VS4Mac) you’re running on, and its version .NET SDK (reflecting any global.json): Version: 5.0.102 Commit: 71365b4d42

Runtime Environment: OS Name: Windows OS Version: 10.0.19042 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\5.0.102\

Host (useful for support): Version: 5.0.2 Commit: cb5f173b96

.NET SDKs installed: 1.1.13 [C:\Program Files\dotnet\sdk] 1.1.14 [C:\Program Files\dotnet\sdk] 2.1.617 [C:\Program Files\dotnet\sdk] 2.1.700 [C:\Program Files\dotnet\sdk] 2.1.701 [C:\Program Files\dotnet\sdk] 2.1.812 [C:\Program Files\dotnet\sdk] 2.2.300 [C:\Program Files\dotnet\sdk] 3.1.300 [C:\Program Files\dotnet\sdk] 3.1.405 [C:\Program Files\dotnet\sdk] 5.0.102 [C:\Program Files\dotnet\sdk]

.NET runtimes installed: Microsoft.AspNetCore.All 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.24 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.24 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 1.0.15 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 1.0.16 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 1.1.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 1.1.13 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.24 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 3.1.11 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 5.0.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET runtimes or SDKs: https://aka.ms/dotnet-download

Visual Studio Enterprise 16.8.4