I have an ASP.Net MVC5 application, using the Identity \"out of the box\" template, as per ASP.Net Identity 2.0.0. I need to upgrade it to use the newer code that is in the
Do you have SSL setup locally? Are authenticating on HTTPS then being redirected to HTTP which is killing the cookie & redirecting back to the HTTPS login page
Have you got something in the web.config for forms authentication redirect like
protection="All" requireSSL="true" loginUrl="~/Account/Login.aspx"
Do your cookies look ok?