Virtualization
Windows Server — Virtualization Rights
Your Windows Server license determines how many virtual machines (VMs) you can run. Standard edition allows 2 VMs, Datacenter allows unlimited. Learn how stacking works and when to switch to Datacenter.
VM Rights by Edition
Standard
Each Standard license permits running 2 virtual machines (OSEs). The physical host must run only the Hyper-V role — no other workloads are allowed on the host itself.
- 2 VMs per license
- Physical host — Hyper-V role only
- For more VMs — license stacking
Datacenter
Datacenter edition permits running an unlimited number of virtual machines on a single physical server. Ideal for high-density virtualization scenarios.
- Unlimited VMs
- All Datacenter features (Shielded VMs, SDN, S2D)
- Most cost-effective for 13+ VM scenarios
Standard License Stacking
If you need more than 2 VMs with Standard edition, you can purchase additional Standard licenses for the same physical server. Each additional license adds 2 more VMs.
| Standard Licenses | Permitted VMs | Approx. Cost |
|---|---|---|
| 1x Standard | 2 VMs | ~$1,070 |
| 2x Standard | 4 VMs | ~$2,140 |
| 3x Standard | 6 VMs | ~$3,210 |
| 4x Standard | 8 VMs | ~$4,280 |
| 6x Standard | 12 VMs | ~$6,420 |
| 7x Standard | 14 VMs | ~$7,490 |
Example: 6 VMs require 3x Standard licenses
3 licenses × 2 VMs = 6 VMs. Each license must cover all physical cores of the server.
Break-Even Analysis: Standard vs Datacenter
A Datacenter license costs approximately ~$6,200 (16-core). A Standard license costs ~$1,070. Since each Standard allows 2 VMs, the break-even point is approximately 13 VMs — beyond that count, Datacenter becomes more cost-effective.
13 VMs × Standard = 7x licenses = ~$7,490 > Datacenter ~$6,200. Therefore, at 13+ VMs, Datacenter edition is the better choice.
Hypervisor Rules
Windows Server virtualization licensing rules apply to ALL hypervisors — not just Hyper-V. When using VMware ESXi, KVM, Xen, or other hypervisors, the same VM limits apply.
- Hyper-V, VMware ESXi, KVM — same VM limits apply to all
- When using VMware, the free Hyper-V host right does not apply
- The Hyper-V-only host restriction applies only to Hyper-V environments
- VM count is determined by the license, not the hypervisor
Related Articles
| Windows Server | Windows Server Core Licensing |
| Licensing | CAL — Client Access License |
| RDS | RDS — Remote Desktop Services Licensing |