Custom post Sign-in page and Sign-out page for Microsoft Identity platform - asp.net-core

Question

I would like to use Microsoft Identity platform in my ASP.NET Core.NET 6 application with a custom sign in and sign out page.
In my case, i don't want to redirect automatically user to Microsoft sign in page but to my custom sign in page (that contain login button).Same for signout page.
I am using Microsoft.Identity.Web and Microsoft.Identity.Web.UI
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
.AddMicrosoftIdentityWebApp(builder.Configuration.GetSection("AzureAd"));
builder.Services.AddAuthorization(options =>
{
// By default, all incoming requests will be authorized according to the default policy.
options.FallbackPolicy = options.DefaultPolicy;
});
builder.Services.AddRazorPages()
.AddMicrosoftIdentityUI();
var app = builder.Build();
how can I change the default behaviour ?

Answer 1

For example, I integrate azure ad in my asp.net core MVC project:
public void ConfigureServices(IServiceCollection services)
{
services.AddMicrosoftIdentityWebAppAuthentication(Configuration);
services.AddControllersWithViews()
// Add the Microsoft Identity UI pages for signin/out
.AddMicrosoftIdentityUI();
}
And I set the default home page to my HelloController, it will reder hello/index.cshtml to the page, with a button <a asp-action="index" asp-controller="home">Home</a>
And in my HomeController.cs, it has [Authorize] annotation on the controller, so when I didn't sign in with azure ad, it will redirect to microsoft sign in page. Then since I set the callback path as the home/index.cshtml, after sign in, I will go to home/index.cshtml.
My home controller:
using Microsoft.AspNetCore.Authorization;
[Authorize]
public class HomeController : Controller
{