What’s new in R2?
Windows Server 2008 R2 includes many enhancements that make this release the most robust Windows Server Web application platform yet. It offers an updated Web server role, Internet Information Services (IIS) 7.5, and greater support for .NET on Server Core. Design goals for IIS 7.5 concentrated on improvements that enable Web administrators to more easily deploy and manage Web applications, and that increase both reliability and scalability. Additionally, IIS 7.5 has streamlined management capabilities and provides more ways than ever to customize your Web serving environment.
The following improvements to IIS and the Windows Web platform are included in Windows Server 2008 R2: