Windows Server 2019 End of Life: Dates, ESU and Upgrade Options (2016 Included)

Reviewed 29 September 2026 by Jay, Technical Support Advisor at Nerdused.

Windows Server 2019 end of life is 9 January 2029. That is the day Microsoft stops releasing security updates for Server 2019 Standard, Datacenter and Essentials. Mainstream support (new features and non-security fixes) already ended on 9 January 2024, so a Server 2019 machine today gets security patches only. If you are still on Windows Server 2016, your deadline is much closer: extended support ends 12 January 2027.

Windows Server 2019 end of life date and the other versions

These dates come from Microsoft's Fixed Lifecycle Policy (see the official Windows Server 2019 lifecycle page) and apply to every edition of each release.

Version	Released	Mainstream support ended	Extended support (security updates) ends
Windows Server 2016	October 2016	11 January 2022	12 January 2027
Windows Server 2019	November 2018	9 January 2024	9 January 2029
Windows Server 2022	August 2021	13 October 2026	14 October 2031
Windows Server 2025	November 2024	13 November 2029	14 November 2034

Server 2022 mainstream support ends 13 October 2026; security updates continue to 14 October 2031. Server 2025 runs three years longer, to 14 November 2034, which is why it is the default for a fresh licence today.

What Windows Server 2019 end of support means

Your server does not stop working on 9 January 2029. It keeps booting, Active Directory keeps authenticating and file shares keep serving. What stops is the flow of security updates. Every vulnerability discovered after that date stays open on the machine that usually holds your most sensitive workloads.

The practical deadline is earlier than the official one, for three reasons:

• Compliance. Cyber Essentials requires every in-scope operating system to be vendor-supported, PCI DSS requires security patches to be applied promptly, and cyber-insurance renewal questionnaires routinely ask whether you run unsupported systems.
• Vendor support. Line-of-business software, backup agents and antivirus vendors drop support for an OS shortly before or after Microsoft does. Microsoft 365 Apps, for example, left support on Windows Server 2019 on 14 October 2025, more than three years before the operating system itself, and now gets security-only updates there until 10 October 2028.
• Migration time. A domain controller or Remote Desktop host takes planning, testing and a maintenance window. Starting in 2028 is late.

Extended Security Updates for Server 2019: what to expect

Microsoft sells Extended Security Updates (ESU) for server versions that have reached end of support. For Windows Server 2012 and 2012 R2 the programme ran for three years, was free for machines hosted in Azure, and was priced per core, per year, for everything else. Microsoft has not yet published the terms for Server 2019 ESU, but previous programmes have followed the same shape: an annual, per-core purchase.

ESU exists for organisations that genuinely cannot migrate, such as a server tied to a legacy application that will not run on anything newer. If Server 2019 ESU is priced like the 2012 programme, one year on a 16-core server will cost far more than a permanent Windows Server 2025 Standard licence ($49.99 at Nerdused).

Windows Server 2019 upgrade options

1. In-place upgrade to Server 2022 or Server 2025. Microsoft supports a direct in-place upgrade from Server 2019 to both 2022 and 2025, and from Server 2016 to 2019, 2022 or 2025. Roles, settings and data are retained. Back up, confirm your vendor certifies the target version, run setup from the new media and enter your new key. Our Server 2025 install and activation guide and Server 2022 install and activation guide walk through the steps.

2. Fresh install and migrate. Cleaner for servers carrying years of configuration debt, and the only route if the old hardware cannot take the new version. Stand the new OS up alongside the old one, move roles across, then decommission the old machine.

3. Buy ESU and stay put. Only if a dependency genuinely blocks you. Put the migration date in the diary at the same time you buy the first year.

Windows Server 2022 or 2025 for the upgrade?

	Windows Server 2022	Windows Server 2025
Security updates until	14 October 2031	14 November 2034
In-place upgrade from 2019	Yes	Yes
In-place upgrade from 2016	Yes	Yes
Headline features	Secured-core server, TLS 1.3, SMB compression	Hotpatching (via Azure Arc, paid subscription), SMB over QUIC in all editions, Active Directory scalability updates
Best for	Vendor software not yet certified on 2025	New deployments and anything you want to run to the mid-2030s
Standard licence at Nerdused	$49.99 (24-core)	$49.99 (24-core)
Datacenter licence at Nerdused	$49.99 (24-core)	$49.99 (24-core)

Choose Server 2025 unless a vendor tells you not to. It gives you eight years of security updates from today and the same in-place path from 2019. Pick Standard for a physical server running up to two virtual machines and Datacenter when the host runs more than that; the full reasoning is in our Standard vs Datacenter guide.

Do not forget CALs when you move off Server 2019

Client Access Licences are version-tied upwards. Server 2019 CALs do not cover a Server 2022 or 2025 host, so budget for new user or device CALs for everyone who connects, plus RDS CALs for anyone using Remote Desktop sessions. The Server 2025 50 User CAL pack ($120) covers a typical office, and the Server 2025 Standard + 50 RDS User CAL bundle ($379.99) is the economical route for a terminal server. See RDS CALs explained and Windows Server licensing explained.

A simple Server 2019 EOL migration plan

1. Now: list every 2016 and 2019 server, its roles and the software it runs. Ask each vendor which version they certify.
2. Before January 2027: move every Server 2016 machine. Its extended support ends 12 January 2027.
3. During 2027: migrate Server 2019 domain controllers, file servers and RDS hosts to Server 2025, one role at a time, with a tested backup before each.
4. By mid-2028: decommission the last 2019 host. That leaves six months of slack before 9 January 2029.

Windows Server 2019 end of support FAQs

When does Windows Server 2019 support end?

Extended support, which includes security updates, ends on 9 January 2029. Mainstream support ended on 9 January 2024. All editions (Standard, Datacenter and Essentials) share the same dates.

Is Windows Server 2019 still supported in 2026?

Yes. It is in extended support, so it still receives monthly security updates until January 2029, but no new features or non-security fixes.

Can I upgrade Windows Server 2019 to 2025 in place?

Yes. Microsoft supports a direct in-place upgrade from Server 2019 to Server 2025 and to Server 2022. Server 2016 can also upgrade in place to 2019, 2022 or 2025. Back up first, check hardware and vendor compatibility, and have your new product key ready.

What happens if I keep running Server 2019 after January 2029?

It keeps running, but new vulnerabilities stay unpatched and compliance audits will flag it.

Will there be Extended Security Updates for Windows Server 2019?

Probably. Microsoft sold paid ESU for Server 2012 and 2012 R2 for three years, free in Azure and priced per core elsewhere. Server 2019 ESU terms have not been published yet, so expect an annual, per-core cost.

Do my Server 2019 CALs work with Server 2025?

No. CALs must be the same version as the server or newer. Server 2025 CALs work against a 2019 host, but 2019 CALs do not cover a 2022 or 2025 host, so a version upgrade means new CALs.

Should I still buy a Windows Server 2019 licence?

Only for a specific reason, such as an application that is certified on 2019 and nothing newer. A Server 2019 Standard 16-core licence ($39.99) is the cheapest way to stand up a legacy-compatible box, but with under two and a half years of updates left, Server 2025 at $49.99 is the better buy for almost everyone.

Vendor not yet certified on 2025? Server 2022 is supported to 14 October 2031.

Every Windows Server licence sold at Nerdused is a genuine key that activates against Microsoft's servers. The licence is for the server it activates on; reinstalling on that same machine is fine. All Server 2019, 2022 and 2025 keys, CAL packs and bundles are in the Windows Server collection.