Windows Server 2022 is available in two editions, Standard and Datacenter, each licensed per physical processor core. The edition you choose determines how many virtual machines you can run under a single license and which advanced features, such as Shielded VMs and Stretch Clusters, are available. Understanding these distinctions before purchasing prevents over-spending on Datacenter for workloads that Standard handles, or under-licensing a virtualization-heavy environment. Organizations running desktop Windows alongside their servers should also check our guide on testing Windows 11 compatibility to plan client upgrades alongside the server deployment.
Beyond the edition choice, Windows Server 2022 licensing requires a minimum of 16 core licenses per physical server, sold in two-core packs. Every user or device that accesses the server must also have a Client Access License (CAL). Organizations with five or more licenses can use volume licensing for discounts, while Software Assurance provides ongoing updates and support for the duration of the subscription.
Quick Answer
Windows Server 2022 Standard allows up to 2 VMs per licensed server; Datacenter allows unlimited VMs. Both editions require core licenses covering all physical cores, with a minimum of 16 cores per server (purchased as 8 two-core packs). Every user or device accessing the server also needs a CAL. Small businesses with up to 25 users can choose Server Essentials instead. Per-VM licensing is available only with active Software Assurance. Contact a Microsoft partner or reseller to confirm the best licensing path for your environment.
Editions of Windows Server 2022
Windows Server 2022 comes in Standard and Datacenter editions. Standard is suited for physical or lightly virtualized environments, while Datacenter is designed for large enterprises running many virtual machines or requiring advanced storage and security features.
The table below summarizes the key differences between the two editions:
| Feature | Standard | Datacenter |
| Maximum number of physical cores licensed per server | 2 | Unlimited |
| Maximum number of virtual machines licensed per server | 2 | Unlimited |
| Support for Hyper-V | Yes | Yes |
| Support for Storage Replica | Yes | Yes, up to 2TB |
| Support for Storage Spaces Direct | Yes | Yes |
| Support for Shielded Virtual Machines | No | Yes |
| Support for Stretch Clusters | No | Yes |
Licensing Options for Windows Server 2022
Windows Server 2022 offers three main licensing models:
- Per-core licensing: The standard model for most deployments. You must purchase a license for each physical core on your server, covering all cores across all processors. Licenses are sold in two-core packs, and every server requires a minimum of 16 cores licensed (8 packs), regardless of the actual core count.
- Per-virtual machine licensing: Introduced in Windows Server 2022, this model requires a license for each virtual machine rather than for the physical host. It is only available to customers with active Software Assurance or subscription licenses, making it better suited for organizations already enrolled in those programs.
- Server Essentials licensing: A simplified option for small businesses with up to 25 users and 50 devices. Server Essentials bundles a Windows Server Standard license with a set of Microsoft services and does not require separate CALs for covered users, making it significantly cheaper for small deployments.
Choosing the Right Licensing Option
For a straightforward physical server with few or no virtual machines, per-core Standard licensing is the most cost-effective choice. If you run many VMs on each host, Datacenter licensing becomes more economical because it covers unlimited VMs per server under a single license. Per-VM licensing is worth considering if your organization already has Software Assurance, since it provides flexibility as VM counts change. After deploying Windows Server, also ensure client machines are properly protected — our guide on setting up Windows Security on Windows 10 covers endpoint protection for the client side of your environment.
If your environment includes a mix of licensing scenarios, a Microsoft partner or reseller can help model the total cost across options before committing.
Additional Licensing Considerations
Beyond the core edition and model choice, three additional items affect total licensing cost:
- Client Access Licenses (CALs): Required for every user or device that connects to a Windows Server 2022 server. Device CALs cover a single device accessing any Windows Server in your organization. User CALs cover a single user from any device. Choose based on whether users or devices are the binding factor in your environment.
- Software Assurance: A subscription add-on that provides access to new Windows Server versions, security patches, support, and training resources during the subscription term. It is not required, but enables per-VM licensing and simplifies upgrade planning. If Windows Update delivery to server-managed clients encounters issues, see our guide on restarting Windows Update-related services to restore update functionality.
- Volume licensing: Available to organizations purchasing five or more licenses. Volume licensing provides pricing discounts, centralized license management, and flexible payment terms compared to retail purchasing.