Windows Server end of life: end of support by version
Microsoft · Operating Systems
For Windows Server by Microsoft, patchletter knows 12 support cycles. 8 of them have already ended and receive no more security updates. The next support window closes on 12/01/2027, that is in 138 days. The current version of Windows Server is 10.0.26100. The cycles come from the open endoflife.date project, last reconciled on 26/08/2026.
When does support end for which Windows Server version?
A cycle is a maintained version line. Where a date is given, support ends on that day — after it the vendor ships no more security updates for that line.
| Cycle | Latest version | End of support | Status |
|---|---|---|---|
| 2025LTS | 10.0.26100 | 3001 days left | EOL 14 Nov 34 |
| 23h2-ac | 10.0.25398 | 107 days ago | End of Life |
| 2022LTS | 10.0.20348 | 1874 days left | EOL 14 Oct 31 |
| 20h2-sac | 10.0.19042 | 1479 days ago | End of Life |
| 2004-sac | 10.0.19041 | 1717 days ago | End of Life |
| 1909-sac | 10.0.18363 | 1934 days ago | End of Life |
| 1903-sac | 10.0.18362 | 2088 days ago | End of Life |
| 1809-sac | 10.0.17763 | 2116 days ago | End of Life |
| 2019LTS | 10.0.17763 | 866 days left | EOL 9 Jan 29 |
| 1803-sac | 10.0.17134 | 2480 days ago | End of Life |
| 1709-sac | 10.0.16299 | 2697 days ago | End of Life |
| 2016LTS | 10.0.14393 | 138 days left | EOL 12 Jan 27 |
Which Windows Server versions no longer receive security updates?
8 of 12 cycles have ended. If you run one of those lines, the vendor ships you no more patches — not even for critical flaws.
- Windows Server 23h2-ac10.0.25398
- Windows Server 20h2-sac10.0.19042
- Windows Server 2004-sac10.0.19041
- Windows Server 1909-sac10.0.18363
- Windows Server 1903-sac10.0.18362
- Windows Server 1809-sac10.0.17763
- Windows Server 1803-sac10.0.17134
- Windows Server 1709-sac10.0.16299
Where does the EOL data for Windows Server come from?
From the open endoflife.date project, which collects vendors' official support commitments. patchletter reconciles the cycles daily; the Windows Server data is as of 26/08/2026. In case of doubt the vendor's own lifecycle page applies — patchletter deliberately stores no vendor full texts.
Do not miss the Windows Server end of support
Subscribe to the product and get new releases by email — the EOL status sits right on the product page. Free, one-click unsubscribe.
Watch Windows Server