Windows Server 2016 Datacenter

What is included in Windows Server 2016 Datacenter?

Unlimited Virtualization – Run any number of Hyper-V VMs per licensed server.
Storage Spaces Direct – Pool local server disks into clustered shared storage.
Storage Replica – Block-level server-to-server replication for disaster recovery.
Shielded VMs – Encrypt and lock VMs against host-level tampering.
Software-Defined Networking – Centrally control virtual networks and the Network Controller.
Core Capacity – Core-based licensing, minimum 16 cores per server.
Important – Client Access Licenses (CALs) are not included in this edition.

What are the main benefits of Windows Server 2016 Datacenter?

Windows Server 2016 Datacenter is the top edition built for heavily virtualized and software-defined data centers. It unlocks every 2016 feature, including unlimited VM rights and storage features that the Standard edition does not provide.

VM Density – Consolidate many workloads onto fewer physical hosts.
Hyper-Converged Storage – Build clustered storage without a separate SAN.
Tenant Isolation – Protect VMs in shared or high-security environments.
Disaster Recovery – Replicate volumes between sites without SAN licensing.
Perpetual Ownership – One-time core license tied to the hardware.
Downgrade Coverage – Run earlier supported Server versions if needed.

What does Windows Server 2016 Datacenter do?

Windows Server 2016 Datacenter is the server operating system used to host virtual machines, Active Directory, file services, and line-of-business applications on company hardware. Its defining job is large-scale virtualization: one licensed host can run an unlimited number of Hyper-V VMs, so an admin can stack a domain controller, a SQL host, and a dozen application servers on the same machine without buying more OS licenses for each guest. It also runs core infrastructure roles such as DNS, DHCP, failover clustering, and file servers. For a busy host where VM count keeps growing, this removes the constant relicensing that the Standard edition forces.

User CAL or Device CAL: What You Really Need
Explains when a User CAL or Device CAL is the more cost-effective choice when upgrading to the Standard edition.

End of Support for Windows Server 2022: Windows Server 2025 vs. 2022 vs. 2019: Is It Worth Upgrading?
Compares the 2019, 2022, and 2025 releases to help determine whether upgrading to the latest version is worthwhile.

How is Datacenter different from Windows Server 2016 Standard?

The core difference is virtualization rights: Datacenter grants unlimited VMs per licensed server, while Standard 2016 covers only two OSEs and must be fully relicensed for each additional pair. Datacenter also exclusively includes Storage Spaces Direct, Storage Replica, Shielded VMs, Software-Defined Networking, and the Network Controller, none of which exist in 2016 Standard. Both editions use the same core-based model and both require CALs. For a host that will run more than a handful of VMs or needs software-defined storage, Datacenter is usually cheaper than repeatedly stacking Standard licenses.

Who is Windows Server 2016 Datacenter best suited for?

It is best suited for organizations running highly virtualized hosts where the VM count would otherwise force repeated Standard relicensing. Because one Datacenter host carries unlimited VM rights, a virtualization admin can keep adding guest servers as the environment grows without recalculating OS licenses each time. It also fits teams that want software-defined storage with Storage Spaces Direct instead of buying a dedicated SAN. If a server will only ever host one or two VMs, the Standard edition covers that scenario at lower cost.

Does Windows Server 2016 Datacenter require Client Access Licenses (CALs)?

Yes. The core license covers the server software itself, but every user or device that accesses the server still needs a separate Windows Server CAL, and CALs are not part of this product. This matters because the per-core license alone does not make the server legally accessible to staff; a 30-person office needs 30 User or Device CALs on top of the core licenses. If users connect through Remote Desktop session hosting, they additionally need RDS CALs, which are separate again from the base Windows Server CAL. Buy the CAL type that matches how people connect before deployment to avoid a compliance gap.

What are the virtual machine licensing limits in this edition?

There is no software-imposed limit on virtual machines in Datacenter; once the host is fully licensed by core, you may run the OS in the physical environment plus any number of VMs on that server. The practical ceiling is set only by the hardware, namely available RAM, CPU cores, and storage. This is the key contrast with Standard 2016, where each license block covers just two OSEs and you must relicense all cores again for every additional pair. For a host expected to grow past four or five VMs, Datacenter typically becomes the more economical choice rather than stacking Standard licenses.

What are the core licensing minimums for this edition?

Windows Server 2016 Datacenter uses core-based licensing with a minimum of 16 core licenses per server and a minimum of 8 core licenses per physical processor. You must license every physical core in the server, so a host with two 12-core processors needs 24 core licenses, not the 16-core minimum. The 16-core floor means even a small single-socket server cannot be licensed below that count. Check the exact core count of your CPUs before purchasing, because under-licensing the physical cores is the most common mistake on Datacenter hosts.

Can it host Remote Desktop Services (RDS) sessions natively?

Yes, the Remote Desktop Services role is part of Windows Server 2016 Datacenter and can be installed to host session-based desktops and apps. However, the role being present is not the same as being licensed to use it: every user or device connecting to RDS needs an RDS CAL in addition to the standard Windows Server CAL. Without RDS CALs, the deployment runs only during the built-in grace period and then stops accepting connections. Plan for both CAL types if you intend to publish remote desktops or applications from this server.

Legal Information About Our Products

keys.express and keys.discount are online platforms for product keys. The product keys available in our shops for Windows and other software are inexpensive, secure, legal and come with an activation guarantee.

Below you will find the most important legal information about our products.

Unused and Non-Activated Product Keys

We offer exclusively unused and non-activated product keys. The keys have never been redeemed for activation and are fully available to the purchaser for the first-time activation of the respective product. A key that has already been redeemed could no longer be used for a new activation and is therefore not offered by us.

Trading in these product keys is permissible in the European Union and in Switzerland under current case law, provided that the necessary conditions are met. These conditions are as follows:

• The software must originally have been placed on the market with the consent of the rightholder within the territory of the EU, another contracting state of the EEA, or Switzerland by way of sale.
• The license for the software must have been granted in return for the payment of a fee intended to enable the rightholder to obtain remuneration corresponding to the economic value of the copy of the software.
• The rightholder must have granted the first acquirer the right to use the software permanently (for an unlimited period).
• Any improvements and updates that the subsequently downloaded computer program has compared to the originally downloaded one must be covered by a maintenance agreement concluded between the rightholder and the first acquirer.
• The original licensee must have made their own copies unusable.

This trade is legally permissible because the underlying license was already placed on the market with the consent of the rightholder within the EU/EEA or Switzerland in return for appropriate remuneration. As a result, the so-called principle of exhaustion has taken effect, which permits the resale of individual product keys — in particular those originating from volume license agreements. Microsoft or the respective software provider has already received appropriate remuneration for this.

keys.express and keys.discount ensure that the aforementioned conditions are met and that the lawful use of the software is guaranteed. The requirements arising from European legislation are also observed in Switzerland.

Important note: The acquisition of a product key through the transmission of a combination of numbers and letters in digital form does not, in itself, constitute a license for the lawful use of the program. The license only arises from the respective installation and the associated acceptance of the manufacturer's terms of use.

Further information can be found here:

• Legal assessment by Swiss lawyers

Overview of the Most Important Legal Information

• We offer unused, non-activated product keys for the activation of the respective computer programs. The key alone is not yet a license.
• The license only arises from the respective installation and the resulting acceptance of the terms of use. These terms of use govern the right to use the software between you and the respective manufacturer.
• The principle of exhaustion has, as a rule, taken effect — i.e. the license is "used up" — as soon as it was lawfully placed on the market for the first time. The products concerned are software placed on the market for unlimited-time use in the form of an activatable product key with the option to download the program. Microsoft or the respective software provider has received appropriate remuneration for this.
• You gain access to particularly attractively priced product keys from volume license agreements, which are to be treated legally in the same way as parts of volume licenses upon first acquisition.
• The software itself is always the same original software that is also obtained through official download channels or manufacturer sources. You are therefore not paying for a different or inferior version, but for a valid activation key or a corresponding license.
• All brand names and brand logos are registered trademarks, whose use here serves solely for product description — the ownership rights lie with the respective trademark holder.