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.