Windows Server 2025: What's New, Requirements & Licensing

This is a reference page our Windows Server support team maintains on Windows Server 2025: the release date, what changed from 2022, hardware requirements, edition differences, and licensing.

Release date and support lifecycle

Windows Server 2025 reached general availability on November 1, 2024. It follows the Fixed Lifecycle Policy: mainstream support ends November 13, 2029, and extended support ends November 14, 2034. The dates apply to all four editions — Standard, Datacenter, Datacenter: Azure Edition, and Essentials — and are published on the Microsoft Lifecycle page for Windows Server 2025.

Where 2025 sits in the full version timeline — and which older versions are already out of support — is covered in our Windows Server versions reference.

What's new in Windows Server 2025

The complete list is in Microsoft's What's new in Windows Server 2025 article. The items below are the ones that change day-to-day operations.

Hotpatching via Azure Arc

Hotpatching — installing OS security updates without a restart — was previously exclusive to Datacenter: Azure Edition. In Windows Server 2025, Standard and Datacenter machines connected to Azure Arc can receive hotpatches after the feature is enabled in the Azure Arc portal. Microsoft initially announced Arc-enabled hotpatching as a paid subscription, then made it available at no extra cost. The cadence: a baseline cumulative update every three months (restart required), followed by two months of restart-free hotpatch releases. Non-security updates, .NET updates, and drivers still require normal patching. Details in the Hotpatch documentation.

Active Directory improvements

• Optional 32k database page size. AD has used an 8 KB ESE database page since Windows 2000, which capped object sizes and multivalued attributes. New domain controllers can use a 32k-page database (multivalued attributes now hold roughly 3,200 values, a 2.6x increase). Moving to 32k pages is a forest-wide change requiring all DCs to be 32k-capable.
• New forest and domain functional levels (DomainLevel/ForestLevel 10) — required for the 32k page feature. Microsoft is not retrofitting functional levels for 2019 or 2022.
• Delegated Managed Service Accounts (dMSA) — migrate legacy service accounts to accounts with managed, fully randomized keys while the original passwords are disabled.

SMB over QUIC in Standard and Datacenter

SMB over QUIC — encrypted, low-latency file access over the internet without VPN — was Azure Edition-only in 2022. In 2025 it is available in Standard and Datacenter, with client access control via certificates, connection auditing, and configurable alternative ports for TCP, QUIC, and RDMA.

Storage and performance

NVMe storage handling is optimized: higher IOPS with lower CPU utilization on the same hardware compared to Windows Server 2022. Storage Spaces Direct and Hyper-V also pick up incremental improvements, including GPU partitioning for VMs.

Management and tooling

• WinGet installed by default — run winget from a fresh install to add packages without downloading installers manually.
• Windows Terminal available — search for Terminal in the Start menu on Desktop Experience installs.
• Wireless LAN service installed by default (startup set to manual; enable with net start wlansvc).
• Security defaults tightened — SMB signing required by default, NTLM reduction, and credential protections. Secured-core server features (TPM 2.0, Secure Boot, VBS, DRTM) carry forward from 2022.

Hardware requirements

From the official hardware requirements page:

Editions: Standard vs. Datacenter vs. Azure Edition

Datacenter: Azure Edition cannot be installed on ordinary on-premises hardware. Essentials remains available for small deployments through OEM channels, with its own single-CPU licensing terms.

Licensing and pricing

The core licensing model is unchanged from Windows Server 2022: per-core licensing sold in packs, 8-core minimum per processor and 16-core minimum per server, plus a Windows Server CAL for every accessing user or device. Suggested retail pricing on the official Windows Server pricing page:

New for this release: a pay-as-you-go subscription option through Azure Arc at $33.58 per core per month (or $0.046 per core per hour), billed to an Azure subscription. It is an alternative to perpetual licensing for short-lived or variable workloads; for servers that run continuously year-round, perpetual licensing remains far cheaper. For activation mechanics — KMS client setup keys, AVMA keys, and retail key differences — see our Windows Server 2025 product keys reference.

Upgrade paths

In-place upgrade to Windows Server 2025 is supported from Windows Server 2019 and Windows Server 2022, keeping settings, roles, and data. Older versions (2012 R2, 2016) require either intermediate in-place hops or, more practically, a side-by-side migration to new hardware or VMs. The usual constraints apply: the edition cannot move down (Datacenter cannot become Standard), evaluation builds need conversion before upgrading, and domain controllers are better rebuilt than upgraded in place — promote a new 2025 DC, transfer FSMO roles, and demote the old one.

Evaluation ISO

A free 180-day evaluation of Windows Server 2025 (ISO, VHD, or Azure image) is available from the Microsoft Evaluation Center. The evaluation build can be converted to a licensed retail edition with DISM and a valid product key, so a lab evaluation can become the production install without reinstalling.

FAQ

What is the Windows Server 2025 release date?

November 1, 2024 — the general availability date recorded on the Microsoft Lifecycle page. Evaluation builds were available earlier in 2024 through the Insider program.

How long will Windows Server 2025 be supported?

Mainstream support runs to November 13, 2029, and extended support (security updates only) to November 14, 2034, under the Fixed Lifecycle Policy.

Does Windows Server 2025 licensing cost more than 2022?

The model is the same — per-core packs with a 16-core server minimum plus CALs. The list price for Standard rose modestly (about 10 percent over 2022 list). The pay-as-you-go option at $33.58 per core per month is new and entirely optional.

Is hotpatching free in Windows Server 2025?

For Azure Arc-connected Standard and Datacenter machines, yes — Microsoft made Arc-enabled hotpatching available at no extra cost after initially announcing it as a paid subscription. Datacenter: Azure Edition has always included it. The server must be connected to Azure Arc either way.

Can I upgrade from Windows Server 2019 directly to 2025?

Yes. In-place upgrade is supported from both 2019 and 2022. Verify the CPU meets the new SSE4.2/POPCNT requirement first, and take a full backup — there is no rollback from a completed in-place upgrade other than restore.

What is the difference between Standard and Datacenter in 2025?

Virtualization rights (2 VMs vs. unlimited), Storage Spaces Direct, software-defined networking, and unlimited Storage Replica are Datacenter-only. The 2025 release narrowed one gap: SMB over QUIC is now in Standard.