Uses ASP.NET Identity to manage local user registration (usernames/passwords) or social logins like Google and Facebook.

Best for intranet applications where users are verified via their Windows machine credentials on a local domain.

Whether you are pivoting from a public-facing app to an internal tool or modernizing an older codebase, changing your authentication type is a multi-step process that involves more than just a Web.config edit. 1. Understand the Core Options