Windows Server 2016 Datacenter – 5 Client User CAL

Windows Server 2016 Datacenter with 5 Client User CALs combines a Windows Server 2016 Datacenter license with five Windows Server 2016 user client access licenses. Datacenter is the edition for virtualization hosts and private clouds: on a fully licensed server it covers unlimited Windows Server virtual machines. The five user CALs give five named people the right to use that server’s services, such as sign-in, file shares and printing, from any of their devices. HypestKey sells these Server 2016 Datacenter user CALs together with the key for teams that keep existing 2016 infrastructure running.

Key takeaways

• Windows Server 2016 Datacenter: every Standard role plus Storage Spaces Direct, Storage Replica, shielded VMs and the Network Controller.
• Five Windows Server 2016 user CALs: each covers one person on any number of devices.
• 2016 CALs give access to Windows Server 2016 and earlier versions, not to 2019, 2022 or 2025 servers.
• Extended support ends January 12, 2027: plan the upgrade path now.
• Keys emailed instantly after payment, no account needed.

What do you get with Windows Server 2016 Datacenter and 5 user CALs?

You receive a product key that activates Windows Server 2016 Datacenter and five Windows Server 2016 user CALs. The key licenses the server operating system. The CALs license access: each one lets a single named user connect to the server’s services, such as Active Directory sign-in, file and print sharing, from as many devices as that person uses.

Datacenter carries every Windows Server 2016 role, from Active Directory, DNS and DHCP to IIS, Hyper-V and failover clustering. On top it adds the software-defined datacenter features. Storage Spaces Direct pools local disks across cluster nodes. Storage Replica copies volumes between servers or sites, and in 2016 it exists only in Datacenter. Host Guardian Hyper-V Support runs shielded VMs, and the Network Controller manages software-defined networking. A Datacenter host also activates Windows Server guests through Automatic Virtual Machine Activation, so each VM needs no separate key.

Unlike RDS CALs, Windows Server CALs are not typed into Windows anywhere. There is no CAL activation wizard for them. Keep the order email as your proof of license, together with the server key.

How do Windows Server 2016 user CALs work?

A Windows Server 2016 user CAL is the right for one named person to access Windows Server 2016 or an earlier version, from any number of devices. Microsoft requires a CAL for every user or device that accesses a Standard or Datacenter server. CALs give access to their own version and older ones, never to newer servers.

Do your users work in Remote Desktop sessions on the server? Then add RDS CALs; the Windows Server 2016 Standard with RDS 50 device CALs set shows how that bundle looks. Data: Microsoft licensing documentation.

Datacenter or Standard: which Windows Server 2016 edition do I need?

Choose Windows Server 2016 Datacenter when one host runs many Windows Server virtual machines or when you need Storage Spaces Direct, Storage Replica or shielded VMs. Choose Standard for a physical server or a host with up to two Windows Server VMs. Both editions need Windows Server CALs, and both accept the same 2016 user CALs.

A single file and domain server with a handful of VMs at most? The Windows Server 2016 Standard with 5 user CALs set does the same job for less. Source: Microsoft Learn, comparison of Windows Server editions.

What are the system requirements for Windows Server 2016 Datacenter?

Windows Server 2016 Datacenter needs a 1.4 GHz 64-bit processor with NX, DEP and Second Level Address Translation, 1 GB of RAM for Server Core or 2 GB for Desktop Experience, 32 GB of disk space and a 1 Gbps Ethernet adapter. Virtualization hosts need far more memory, sized by the VMs they run.

Source: Microsoft Learn, hardware requirements for Windows Server. Setting up a VM with the bare minimum of 512 MB fails; give the VM at least 800 MB during setup.

How do I activate Windows Server 2016 Datacenter?

Enter the Datacenter product key in Settings or with the slmgr command, then confirm the activation status. If the server was installed from evaluation media, convert it with DISM first. The five user CALs need no activation: keep the order email as proof of license.

1. Open Settings > Update & Security > Activation > Change product key and enter the Datacenter key.
2. On Server Core, or if you prefer the command line, run slmgr /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX and then slmgr /ato in an elevated Command Prompt.
3. Evaluation install? Run DISM /online /Set-Edition:ServerDatacenter /ProductKey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX /AcceptEula and restart when asked.
4. Check the result with slmgr /dlv: the output should show Datacenter and a licensed status.
5. File the order email with your licensing records; it documents the five user CALs.

Tip: Activation fails with a network error? Run slui 4 to start phone activation, which works on servers with no internet access.

How long is Windows Server 2016 supported?

Windows Server 2016 mainstream support ended on January 11, 2022, and extended support ends on January 12, 2027. After that date Microsoft stops releasing security updates for it. The Datacenter license and the five user CALs stay valid, since they are perpetual, but an unpatched server is a security risk.

So who buys 2016 today? Mostly teams that need to license an existing 2016 host or keep an older line-of-business app running while they plan a move. Our article on Windows Server 2016 end of life lays out the options. For a new host, look at Windows Server 2025, supported until November 14, 2034. All 2016 products sit in the Windows Server 2016 category.

Delivery and support

HypestKey emails your Windows Server 2016 Datacenter key and the CAL details instantly after payment, and no account is needed. You pay by card, Apple Pay or Google Pay through Stripe. If the key does not activate, we help you fix it or send a replacement.

Questions about editions, CAL types or activation go to support@hypestkey.com or the live chat. Something went wrong? We’ll help you fix it.