Microsoft Exchange 4.0 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Microsoft Exchange 4.0 reached end of life on —. It no longer receives security fixes.
Support timeline
Official dates from the Microsoft Exchange release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 11 Jun 1996 | — |
| End of life | — | years ago |
| Latest release | 4.0.996 · 5 May 1998 | final |
Where to go from 4.0
Recommended target: Microsoft Exchange subscription.
The newest actively supported branch is Microsoft Exchange subscription (latest release 15.2.2562.43).
Frequently asked questions
Is Microsoft Exchange 4.0 still safe to use?
Microsoft Exchange 4.0 reached end of life on —, 0 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Microsoft Exchange 4.0?
Yes — the final release (4.0.996) 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 4.0 to?
Upgrade to Microsoft Exchange subscription, the newest actively supported branch.