Windows Server 2022 end of support arrives on 13 October 2026, when the platform exits mainstream support and transitions to extended support, which runs until 14 October 2031. Microsoft posted the reminder on Friday, and it comes with a clear nudge: start testing Windows Server 2025 sooner rather than later.
The timeline is straightforward. The October 2026 security update will be the last one issued under mainstream support. From that point on, Windows Server 2022 moves to extended support, which covers monthly security updates at no additional cost through October 2031. That is still five years away, but enterprise upgrade cycles being what they are, October 2031 has a habit of arriving faster than expected.
Hotpatching Gets an Extra Year for Azure Edition Users
One grace note for organisations running the Datacenter: Azure Edition variant: Microsoft has extended Windows Server 2022 hotpatching until October 2027, a full year beyond the mainstream support end date. Hotpatching allows security updates to be applied without requiring a reboot, which matters considerably in environments where uptime is non-negotiable. For everyone else on standard editions, that particular convenience expires with mainstream support in October 2026.
The hotpatching extension is not the only recent deadline adjustment Microsoft has made quietly. In June, the company extended the free Windows 10 Extended Security Updates (ESU) programme for consumers by an additional year, allowing enrolled devices to keep receiving security patches until 12 October 2027.
Windows Server 2025: the Case for Upgrading Now
Microsoft’s advice is to upgrade to Windows Server 2025, which reached general availability in November 2024, well before Windows Server 2022 end of support becomes a pressing concern. Windows Server 2025 will remain in mainstream support until 13 November 2029, with extended support continuing to 14 November 2034. ‘Plan to upgrade to Windows Server 2025 for full mainstream support,’ Microsoft said, adding that admins should ‘evaluate upgrade options and begin deployment testing early to help ensure a smooth transition.’
For those who need to justify the migration internally, the performance numbers give the business case some substance. According to WindowsForum, Windows Server 2025 delivers up to 60% more IOPS performance compared to Windows Server 2022. In storage-heavy workloads, that kind of throughput improvement is not cosmetic.
The virtualisation story is equally compelling on paper. According to Microsoft Learn, Hyper-V in Windows Server 2025 now supports up to 4 petabytes of memory and 2,048 logical processors per host. Those are figures aimed squarely at large-scale virtualisation environments, and they represent a meaningful jump in ceiling capacity for organisations running dense VM workloads.
Windows Server 2022 itself was unveiled in March 2021 and launched as a Long-Term Servicing Channel (LTSC) release in September 2021, with a promised 10-year support lifecycle, the lifecycle now playing out exactly as advertised. Its successor follows the same LTSC model, with Microsoft describing Windows Server 2025 as ‘now the latest Long-Term Servicing Channel (LTSC) release for Windows Server.’
For admins who want to evaluate the upgrade before committing, a free 180-day trial of Windows Server 2025 is available through the Microsoft Evaluation Center. Servicing dates for the full product portfolio can be checked via the Windows Lifecycle FAQ page and the Lifecycle Policy search tool, and Microsoft also publishes a running list of products reaching end of support or retirement during the current year.
The practical deadline for most organisations is well before October 2031. Extended support covers security patches, but mainstream support is where feature updates, non-security fixes and design change requests live. Any shop still on Windows Server 2022 in 2029 will be running an operating system that has been in maintenance mode for three years, with Windows Server 2025 itself approaching its own mainstream end date. The time to start planning the upgrade is, as Microsoft puts it, now.
