I'm setting up an on-premises environment for an accounting firm and need to ensure I'm making the right choice in terms of performance and licensing. The applications we'll be using include Thomson Reuters Accounting CS, Thomson Reuters Fixed Assets, Intuit QuickBooks Enterprise, and Lacerte by Intuit. From my understanding and vendor guidance, we need to keep SQL Server workloads separate. My setup includes a single physical server in a virtualized environment, and I'm considering two options:
1. Utilize a bare-metal hypervisor like Proxmox to deploy two Windows Server 2025 VMs, each with its own application stack and SQL instance.
2. Use Windows Server 2025 Standard with Hyper-V, running it solely as a Hyper-V host, and creating two Windows Server 2025 guest VMs.
I have some licensing questions too. I know that Windows Server Standard licenses are per physical core (16 core minimum) and that one fully licensed host allows for two guest OSEs. The host must only be for Hyper-V without additional workloads, and if I need more than two VMs, I must get additional licenses. Specifically, I want to know:
1. If I license the host with Windows Server 2025 Standard and use it only for Hyper-V, do I need separate licenses for the two guest VMs, or are they covered by the base license?
2. Are the VMs automatically activated with a licensed Hyper-V host, or do I need to configure KMS or AVMA?
3. From a practical standpoint for the accounting software involved, is there a strong preference for Proxmox over Hyper-V, or vice versa?
5 Answers
Both Proxmox and Hyper-V are solid choices, so go with what you're comfortable with. Just make sure you establish a solid backup and recovery plan, since relying on a single server does pose risks.
Given you're running all Windows VMs, Hyper-V is likely the better route. The Standard edition offers licenses for one Hyper-V host and two VMs, while the Datacenter edition covers an unlimited number of guests.
Running SQL Server in a VM might not always be optimal, especially with a single server. You might want to avoid a one-server approach if possible. Even though Proxmox offers good clustering capabilities, choose the hypervisor you're most comfortable with, as that will help you manage it better.
For your licensing questions: the guest VMs won't be activated just because the host is licensed; you'll need KMS or AVMA. And yes, if the host is a dedicated Hyper-V host, it doesn't count towards your OSEs, but you will need separate licenses for more than two VMs. You can go for Data Center licenses for unlimited guests if needed.
Either option should work fine if you keep your CPU cores in check. As long as your host only runs Hyper-V and nothing else, the two Windows Server guest VMs are covered by the base license. I'd suggest considering a second server setup for added redundancy and running Hyper-V Replication for better reliability.
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