How can configure windows authentication in .NET core api?

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C#

.NET

Hi,
I have .net core(.NET 6) api and React application at client side.

when ever i am enabling the windows authentication in web api and hosted on IIS always getting 401 unauthorized and CORS error .

launchsetting.json

"iisSettings": {
   <big>"windowsAuthentication": true,
   "anonymousAuthentication": false,</big>
   "iis": {
     "applicationUrl": "http://localhost:9100",
     "sslPort": 9001
   },
   "iisExpress": {
     "applicationUrl": "http://localhost:54241",
     "sslPort": 44381
   }
 },

in startup.cs

<big>builder.Services.AddAuthentication(NegotiateDefaults.AuthenticationScheme).AddNegotiate();</big>

and in iis
click on authentication menu and configure

<pre>Anonymous Authentication Enable
Windows Authentication Enable

What I have tried:

I tried to configure as following link
Configure Windows Authentication in ASP.NET Core | Microsoft Docs[^]


but not able to resolve the issue. may be due not able to configure web.config file asper article.


but when i am enabling the

Anonymous Authentication Enable
Windows Authentication Enable

both Anonymous and windows the it is working fine .
but not sure about pros and cons .