How do you secure a .NET app using Azure AD?

• Use Microsoft.Identity.Web for ASP.NET Core.
• Configure authentication in Program.cs:

builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationS

cheme)

.AddMicrosoftIdentityWebApi(builder.Configuration.GetSection("AzureA

d"));

app.UseAuthentication();

app.UseAuthorization();

• Tokens from Azure AD validate API requests.