Pedro Alves, a premier field engineer working for Microsoft has created a very useful Exchange 200x comparisons table. Very useful! The original can be viewed here:
http://blogs.technet.com/sjimmie/archive/2010/05/01/exchange-200x-comparative-table.aspx
Thanks Pedro, good work!
Feature | Exchange 2003 | Exchange 2007 | Exchange 2010 |
Exchange Certificate wizards | No | No | Yes |
EMS Command Log | No | No | Yes |
Property Dialog Command Exposure | No | No | Yes |
Role Based Access Control | No | No | Yes |
Larger and Sequential I/O | No | No | Yes |
Larger Page Size (32 KB) | No | No | Yes |
Optimize for SATA Storage | No | No | Yes |
Continuous Background Online Defragmentation | No | No | Yes |
Online Background Database Scanning | No | No | Yes |
Shadow Redundancy | No | No | Yes |
Incremental Deployment | No | No | Yes |
Database Availability Groups | No | No | Yes |
Mailbox Database Copies | No | No | Yes |
Online Move Mailbox | No | No | Yes |
Incremental ReSync | No | No | Yes |
Cluster Continuous Replication | No | Yes | DAG |
Standby Continuous Replication | No | Yes | DAG |
Local Continuous Replication | No | Yes | No |
Clustered Mailbox Server | Yes | Improved | DAG |
Storage Groups | Yes | Yes | No |
Recovery Storage Group | Yes | Yes | Recovery Database |
Exchange Management Shell | No | Yes | Yes |
Messaging Records Management | No | Yes | Yes |
Transport Rules | No | Yes | Improved |
Disclaimers | No | Yes | Improved |
Multi-Mailbox Search | No | No | Yes |
Legal Hold | No | No | Yes |
Personal Archive | No | No | Yes |
Federated Sharing | No | No | Yes |
Calendar Repair Assistant | No | No | Yes |
Moderated Distribution Groups | No | No | Yes |
Mailbox Folder Permissions Management | No | No | Yes |
Send Mails to Recipients from EMC | No | No | Yes |
MailTips | No | No | Yes |
Moderated Transport | No | No | Yes |
End User End-To-End Message Tracking | No | No | Yes |
Transport Rules Integration with AD RMS | No | No | Yes |
64 Bit Architecture | No | Yes | Yes |
Routing Groups | Yes | AD Site Routing | AD Site Routing |
Administrative Groups | Yes | Universal SG | Universal SG |
Intelligent Message Filter | Yes | No | No |
Link State Routing | Yes | No | No |
Routing Objects | Yes | No | No |
Network Attached Storage | Yes | No | No |
Exchange Installable File System | Yes | No | No |
Event Service | Yes | No | No |
Recovery Storage Group | Yes | Yes | No |
ADUC Exchange Extensions | Yes | No | No |
Mailbox Merge Wizard | Yes | No | No |
Recipient Update Service | Yes | No | No |
iSCSI Support | No | Yes | Yes |
HT & ET Anti-Spam Agents | No | Yes | Yes |
NNTP PF Access | Yes | No | No |
IMAP4 PF Access | Yes | No | No |
NNTP | Yes | No | No |
Monitoring and Status Node | Yes | No | No |
Message Tracking Centre | Yes | ExMFA | ExMFA |
Mailbox Recovery Centre | Yes | ExDRA | ExDRA |
Mailbox Management Service | Yes | MRM | MRM & RP |