Exchange Server 2003 Features in Windows Server 2003 and Windows 2000 Server

Compare the features that Exchange Server 2003 offers when running on Microsoft Windows Server? 2003* to those available in Microsoft Windows® 2000 Server in the following areas:

For more information, read the Exchange Server Compatibility with Windows Server Operating Systems white paper and Better Together: Windows Server 2003 and Exchange Server 2003 page.

Disaster Recovery

Key: = Feature included = Feature included

Exchange Server 2003 Feature
Windows Server 2003Windows 2000 Server SP3 or later
Clustering
Two-node clustering
Four-node clustering Requires Windows 2000 Datacenter Server
Eight-node clustering Requires Windows Server 2003, Enterprise Edition
Improved cluster failover time
Storage
Mount points overcome the 24-drive letter limitation
Standard storage area network (SAN) connectivity
Backup and Restore
Standard backup with third-party hardware
(requires Windows-certified backup vendor)
Database backup (Volume Shadow Copy service)
(requires Windows Volume Shadow Copy service-certified backup vendor)
Mailbox Recovery Center tool
Recovery Storage group

Performance

Key: = Feature included = Feature included

Exchange Server 2003 Feature
Windows Server 2003Windows 2000 Server SP3 or later
Improved Memory Allocation
2-gigabyte (GB) standard allocation
3-GB user mode allocation Requires Windows 2000 Advanced Server
Public Folders
Public folder store administration and replication improvements
E-Mail
Distribution list caching improvements
Suppression of Out of Office messages to distribution lists
Microsoft Office Outlook® 2003-cached Exchange Server mode reduces server load
(requires Outlook 2003)
MAPI compression reducing bytes of data over the wire
(requires Outlook 2003)

Security

Key: = Feature included = Feature included

Exchange Server 2003 Feature
Windows Server 2003Windows 2000 Server SP3 or later
Internet Protocol Security (IPSec) support for front-end and back-end clusters
Cross-forest Kerberos authentication with Outlook 2003 (requires Microsoft Metadirectory Services 2003 [MMS] and Outlook 2003)
Signed Lightweight Directory Access Protocol (LDAP) requests to Active DirectoryR directory service
Front-end and back-end Kerberos authentication
Internet Information Services (IIS) 6.0 security and dedicated application mode
Distribution lists restricted to authenticated users
Real-time Safe and Block lists
Inbound recipient filtering
Advanced junk e-mail protection (requires Outlook 2003)
Virus Scanning API 2.5 (requires third-party antivirus software)
Attachment blocking in Microsoft Office Outlook Web Access
Public folder permissions improvements for unknown users
Restricted submissions improvements

Mobility

Key: = Feature included = Feature included

Exchange Server 2003 Feature
Windows Server 2003Windows 2000 Server SP3 or later
Outlook Web Access user interface (UI) and feature set improvements
Outlook 2003 performance improvements through MAPI compression
HTTP access from Outlook 2003
CHTML browser support (i-Mode phones)
XHTML (Wireless Application Protocol [WAP] 2.0) browser support
HTML browser support (Personal Digital Assistants [PDAs] and Smartphones)
Exchange Server ActiveSync®
Pocket PC and Smartphone support
Up-to-date notifications synchronization
(requires Windows Mobile?-based devices such as Pocket PC and Smartphone)

Collaboration

Key: = Feature included = Feature included

Exchange Server 2003 Feature
Windows Server 2003Windows 2000 Server SP3 or later
Real-time collaboration (replacement for Exchange Server Instant Messaging and Exchange 2000 Conferencing Server)
(requires Real-Time Collaboration service)
Microsoft SharePoint® Portal Server Web Parts (requires SharePoint Portal Server and/or Microsoft Windows SharePoint Services)

Serviceability

Key: = Feature included = Feature included

Exchange Server 2003 Feature
Windows Server 2003Windows 2000 Server SP3 or later
Exchange Server System Manager running on Windows XP
Queues are centralized on a per-server basis
UI improvements}
All system queues are exposed
Cookie authorization enablement
Move log files and queue data using Exchange Server System Manager
Public folder Send hierarchy
Public folder Search capabilities
Public folder Send Contents
Public folder affinity to control referrals
Public folder migration from Exchange Server 5.5 to Exchange Server 2003
Multi-user Move Mailbox function
Dynamic distribution lists

Management

Key: = Feature included = Feature included

Exchange Server 2003 Feature
Windows Server 2003Windows 2000 Server SP3 or later
Multiple Windows forest support
(requires MMS)
Automatic error reporting
1,700 Exchange Server-specific events using Microsoft Operations Manager (requires Microsoft Operations Manager)
Deployment
Deployment and migration tools
Active Directory Connector improvements
Internet Mail Connection Wizard
Multiple Mailbox Move tool

* Exchange Server 2003 does not run on 64-bit editions of Windows Server 2003.

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