Microsoft Identity Extensions 2.0.1459

Microsoft Identity Extensions (MSE) is a set of .NET Framework libraries that developers can use to build ASP.NET applications that rely on external identity providers such as Microsoft Accounts, Google, Facebook, and Twitter for authentication and authorization.

MSE supports .NET Framework versions 3.5 SP1 or later, including .NET Framework 4.0 and later

MSE can be installed through the Visual Studio NuGet package manager or downloaded and installed from the Microsoft download center.

MSE supports Microsoft Accounts, Google, Facebook, and Twitter as external identity providers.

Yes, developers can use MSE with Active Directory Federation Services to enable single sign-on with an on-premises Active Directory infrastructure.

ASP.NET Identity is a newer membership system for managing users and their associated authentication data in ASP.NET applications. While MSE provides support for external identity providers, ASP.NET Identity provides support for local user authentication and management.

No, Microsoft ended mainstream support for MSE on July 13, 2021. However, it is still possible to use the libraries in existing applications.

Yes, Azure Active Directory (AAD) and Azure AD B2C are recommended alternatives to MSE for authentication and authorization in cloud-based ASP.NET applications.

MSE provides extensibility points that allow developers to add support for custom identity providers, including non-Microsoft providers.

No, MSE is not compatible with .NET Core due to architectural differences between the .NET Framework and .NET Core.