[Bug] Cannot get Access token from AcquireTokenInteractive

Which Version of MSAL are you using ? Microsoft.Identity.Client: 4.18.0

Platform .Net 4.7.2

What authentication flow has the issue?

• Desktop / Mobile
  • Interactive
  • Integrated Windows Auth
  • Username Password
  • Device code flow (browserless)
• Web App
  • Authorization code
  • OBO
• Web API
  • OBO

Other? - please describe;

Is this a new or existing app? This is a testing app before applying to my existing app

var pcaOptions = new PublicClientApplicationOptions
            {
                ClientId = "my client id",
                TenantId = "my tenant id",
                RedirectUri = "http://localhost:49468/",
            };

            string[] scopes = new string[] { "SMTP.Send" };

            var app = PublicClientApplicationBuilder.CreateWithApplicationOptions(pcaOptions)
                .WithLogging(Log, LogLevel.Verbose, true)
                .Build();

            var accounts = await app.GetAccountsAsync();
            AuthenticationResult result;

            try
            {
                result = await app.AcquireTokenSilent(scopes, accounts.FirstOrDefault())
                            .ExecuteAsync();
            }
            catch (MsalUiRequiredException)
            {
                try
                {
                    result = await app.AcquireTokenInteractive(scopes)
                            .ExecuteAsync();
                }
                catch (Exception ex)
                {
                }

            }

Expected behavior Getting the result with access token

Actual behavior Exception: A configuration issue is preventing authentication - check the error message from the server for details.You can modify the configuration in the application registration portal. See https://aka.ms/msal-net-invalid-client for details. Original exception: AADSTS7000218: The request body must contain the following parameter: ‘client_assertion’ or ‘client_secret’.

Possible Solution I did some research, people said that I need to set the application as a public client. But no luck

[ntvuong1709it]

@ntvuong1709it Can you provide your manifest from the portal and a link to your code? you can send via email if you prefer : [e-mail]

Sorry for the late response, I have sent you the email with the manifest file. Please have a look. Regarding to my code, I provided above and pretty much it. It’s a console app to test acquiring access token interactively

[jmprieur]

Thanks for the update, @ntvuong1709it Closing this issue.