WinRM IIS Extensions is a new feature in Windows Server® 2008 R2.
What is WinRM IIS Extension?
The Windows Remote Management (WinRM) IIS Extension module provides an Internet Information Services (IIS)-based hosting model. WinRM IIS Extension can be enabled at the either the Web site or virtual directory level. It works by intercepting and redirecting incoming requests to the associated Web site or virtual directory.
Incoming requests are redirected to a WinRM module that scans request contents to determine the correct WinRM plug-in to handle the request. It is recommended that all redirections use Secure Socket Layer (SSL), and that all applications validate the redirected URI before starting a new session.
For more information about WinRM IIS Extension, see