Here is a blog post guide on how to navigate this transition effectively. How to Change Authentication Type in ASP.NET MVC
Switching authentication types in an existing ASP.NET MVC project is a common task when moving from a public internet model (Individual User Accounts) to a private corporate model (Windows Authentication), or vice versa.
Best for intranet applications where users are verified via their Windows machine credentials on a local domain.
This is a common scenario when a pilot project needs to be brought "in-house."
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
