Windows Server 2016 reaches end of life on 12 January 2027, when Microsoft’s extended support ends. After that date Microsoft stops releasing security updates for it, so servers still running it become harder to keep secure. Here are the key dates and what to do before the deadline.
Windows Server 2016 end-of-life dates at a glance
| Version | Released | End of mainstream support | End of extended support (end of life) |
|---|---|---|---|
| Windows Server 2016 | 15 October 2016 | 11 January 2022 | 12 January 2027 |
Windows Server 2016 follows Microsoft’s Fixed Lifecycle Policy. Mainstream support, which included new features and non-security fixes, has already ended. Extended support, which provides security updates, ends on 12 January 2027.
What happens when Windows Server 2016 reaches end of life?
From 13 January 2027, Microsoft will no longer publish security updates or provide technical support for Windows Server 2016, except to organisations that pay for Extended Security Updates. New vulnerabilities discovered after that date will stay unpatched, which can also affect compliance with frameworks such as Cyber Essentials that expect supported, patched software.
What to do before the end-of-life date
- Find every server still running Windows Server 2016, including virtual machines and servers in the cloud.
- Plan in-place upgrades or migrations to a supported version, starting with internet-facing and business-critical servers.
- Check application compatibility with the version you are moving to.
- For servers you cannot move in time, look at Extended Security Updates (ESU). Microsoft offers up to three more years of security fixes for Windows Server 2016, including pay-as-you-go through Azure Arc. Check current pricing and eligibility with Microsoft or your licensing partner.
- Track progress until the last server is upgraded or retired.
Frequently asked questions
When does Windows Server 2016 reach end of life?
Extended support for Windows Server 2016 ends on 12 January 2027. Mainstream support ended on 11 January 2022.
What should I upgrade Windows Server 2016 to?
A supported version such as Windows Server 2022 or Windows Server 2025, starting with internet-facing and business-critical servers.
Sources
Dates taken from Microsoft’s official lifecycle page: Windows Server 2016 lifecycle. Always confirm dates with the vendor before making decisions.