NotImplementedException thrown for non-Entra authorities in Device code flow

[DharshanBJ]

Library version used

4.68.0

.NET version

9.0.102

Scenario

PublicClient - desktop app

Is this a new or an existing app?

This is a new app or experiment

Issue description and reproduction steps

When following the documentation at https://learn.microsoft.com/en-us/entra/identity-platform/scenario-desktop-acquire-token-device-code-flow?tabs=dotnet to acquire an access token via device request, NotImplementedException is thrown. This appears to be coming from

microsoft-authentication-library-for-dotnet/src/client/Microsoft.Identity.Client/Instance/GenericAuthority.cs

Line 43 in 235d32d

throw new NotImplementedException();

Relevant code snippets

var Scopes = new string[] { "user.read" };

var pca = PublicClientApplicationBuilder
    .Create(ClientId)
    .WithExperimentalFeatures()
    .WithOidcAuthority(Authority)
    .WithDefaultRedirectUri()
    .Build();

pca.AcquireTokenWithDeviceCode(Scopes, deviceCodeResult =>
{
    Console.WriteLine(deviceCodeResult.Message);
    return Task.FromResult(0);
}).ExecuteAsync();

Expected behavior

No response

Identity provider

Other

Regression

No response

Solution and workarounds

No response

[github-actions]

Here are some similar issues that might help you. Please check if they can solve your problem.

• Device Code Flow causes NotImplementedException for non-Entra authorities #5133

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Possible solution (Extracted from existing issue, might be incorrect; please verify carefully)

Device code flow isn't supported for non-Entra Identity Providers.

Reference:

• Device Code Flow causes NotImplementedException for non-Entra authorities #5133 (comment)