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Windows Server 2003 R2 extends the Windows Server 2003 operating system, providing a more efficient way to manage and control access to local and remote resources while easily integrating into your existing Windows Server 2003 environment. Windows Server 2003 R2 provides a scalable, security-enhanced Web platform, seamless interoperability with UNIX-based systems and enables new scenarios including simplified branch server management, improved identity and access management, and more efficient storage management. Windows Server 2003 R2 Datacenter Edition and Enterprise Edition also delivers dynamic new licensing that allows customers to get even more value out of server virtualization. This page provides an overview of benefits, new features, and improvements in Windows Server 2003 R2.

Windows Server 2003 R2 integrates the work done in Windows Server 2003 SP1 with selected new features and components, and adds a small number of previously released feature packs. Because Windows Server 2003 R2 is based on Windows Server 2003 SP1, you would need to upgrade only those Windows Server 2003 servers on which you want to run the new features. Because Windows Server 2003 R2 will be serviced with the same service packs and updates as Windows Server 2003, combining Windows Server 2003 operating systems and Windows Server 2003 R2 operating systems in a single environment is very easy.

Windows Server 2003 R2 is an update release of the Windows Server 2003 operating system that is built on top of Windows Server 2003 SP1 and includes new product features, specifically in the following areas: branch office management, identity and access management, and storage management. Windows Server R2 requires a new server license and is available for purchase through the same channels as Windows Server.