I\'m building an MVC application with Azure Active Directory authentication. When I develop locally I would like to be able to sign-in for testing/development purposes. And
You can add multiple redirect uri to your app, that's why the property is implemented as a list! You just need to make sure that you specify which URI to use at runtime. You can do that in many ways - you can specify the return URI at middleware init time, or you can add dynamic code that will inject a redirect URI in the sign in message. For an example of the latter approach, please see RedirectToIdentityProvider in https://github.com/AzureADSamples/WebApp-MultiTenant-OpenIdConnect-DotNet/blob/master/TodoListWebApp/App_Start/Startup.Auth.cs