Microsoft Exchange 2003 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Microsoft Exchange 2003 reached end of life on 8 Apr 2014. It no longer receives security fixes.
Support timeline
Official dates from the Microsoft Exchange release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 28 Sept 2003 | 23y ago |
| Active Support ended | 14 Apr 2009 | security fixes only after this |
| Security Support ended | 8 Apr 2014 | 12y 6mo ago |
| Latest release | 6.5.7654.4 · 1 Aug 2008 | final |
Where to go from 2003
Recommended target: Microsoft Exchange subscription.
The newest actively supported branch is Microsoft Exchange subscription (latest release 15.2.2562.49).
Frequently asked questions
Is Microsoft Exchange 2003 still safe to use?
Microsoft Exchange 2003 reached end of life on 8 Apr 2014, 4,563 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Microsoft Exchange 2003?
Yes — the final release (6.5.7654.4) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Microsoft Exchange 2003 to?
Upgrade to Microsoft Exchange subscription, the newest actively supported branch.