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 94 days. The current version of Windows Server is 10.0.26100. The cycles come from the open endoflife.date project, last reconciled on 30/09/2026.
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 | 2957 days left | EOL 14 Nov 34 |
| 23h2-ac | 10.0.25398 | 151 days ago | End of Life |
| 2022LTS | 10.0.20348 | 1830 days left | EOL 14 Oct 31 |
| 20h2-sac | 10.0.19042 | 1523 days ago | End of Life |
| 2004-sac | 10.0.19041 | 1761 days ago | End of Life |
| 1909-sac | 10.0.18363 | 1978 days ago | End of Life |
| 1903-sac | 10.0.18362 | 2132 days ago | End of Life |
| 1809-sac | 10.0.17763 | 2160 days ago | End of Life |
| 2019LTS | 10.0.17763 | 822 days left | EOL 9 Jan 29 |
| 1803-sac | 10.0.17134 | 2524 days ago | End of Life |
| 1709-sac | 10.0.16299 | 2741 days ago | End of Life |
| 2016LTS | 10.0.14393 | 94 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 30/09/2026. In case of doubt the vendor's own lifecycle page applies — patchletter deliberately stores no vendor full texts.
New Windows Server versions by email
Tick the product and patchletter reports new releases by email. The update email costs nothing, and one click stops it again. The warning 90, 30 and 7 days before support ends is part of patchletter Pro.