- Branch office framework
- Completely redesigned Distributed File System that is more scalable than its predecessor, File Replication Services.
- Remote Differential Compression.
- Print Management Console with new richer view of network printer toplogy.
- Enhanced DFS Namespaces UI
- File Server Resource Manager
- Active Directory Federation Services to share identity over federation trusts.
- Active Directory Application Mode
- Windows Sharepoint Services v2 SP2
- .Net Framework v2
- MMC 3.0 with relibaility enhancements and Whidbey snap
- in authoring.
- Subsystem for Unix Applications
- Interix Subsystem.
- Unix Identity Management with AD & NIS interoperability.
- Network File System with Unix interoperability.
- Quota Management with directory quotas, storage reports, and file screening.
- Simple SAN Management which allows easy setup and management of simple SAN configurations.
- Common Log File System with ARIES logging support.
- New roles : Sharepoint, File Server Role, and Print Server
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Microsoft Windows 2003 Server R2 
