How to Convert Windows Server from Evaluation to Full Version (2026)

Windows Server evaluation editions give you a generous 180-day window to test the operating system in a real environment before committing to a licence. It is an excellent way to validate roles, drivers and line-of-business applications. The catch is that once the trial expires, the server begins to shut down automatically every hour, and that is a disruption no production or lab environment can tolerate for long. The good news is that you do not need to reinstall. Microsoft provides an in-place conversion path that turns an evaluation build into a fully licensed installation while keeping your data, roles and configuration intact.

Before You Begin

Take a fresh system state backup or VM snapshot before you start. The DISM conversion rewrites the edition identifier and triggers activation, and although failures are rare, a rollback point is cheap insurance. You should also confirm that the server can reach Microsoft's activation endpoints on ports 80 and 443. If the machine is offline, you can still complete the conversion and activate later by phone or via a Key Management Service (KMS) host.

Step 1: Check Your Current Edition

Open PowerShell as Administrator and run:

DISM /Online /Get-CurrentEdition

Note the edition name, for example ServerStandardEval or ServerDatacenterEval. You need a product key that matches this edition family. Running DISM /Online /Get-TargetEditions will list every edition you are allowed to upgrade to from your current build.

Step 2: Obtain a Licence Key

Purchase a genuine product key that matches the target edition. Licendi offers Windows Server 2022 Datacenter licences as well as Standard keys with instant email delivery and lifetime validity. If you are still evaluating which edition suits your workload, our Datacenter vs Standard comparison walks through the licensing maths and virtualisation rights in plain English.

Step 3: Convert the Edition

Run the following command in the elevated PowerShell window, substituting your edition target and product key:

DISM /Online /Set-Edition:ServerStandard /ProductKey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX /AcceptEula

Replace ServerStandard with ServerDatacenter if you are upgrading a Datacenter evaluation. The process takes several minutes, during which DISM applies the edition change and prepares the system for a reboot. When prompted, restart the server to finalise the conversion. Domain controllers can be converted the same way, but Microsoft recommends demoting, converting, and then promoting again if you hit any edition mismatch errors.

Step 4: Verify Activation

After the reboot, run slmgr /xpr in PowerShell. The dialogue should confirm permanent activation. If it reports a temporary status, trigger online activation manually with slmgr /ato. For a deeper look at activation health, slmgr /dlv prints the licence status, activation ID and remaining grace period in one view.

Common Issues and Fixes

• Error 0xC004F069: you are trying to apply a retail or OEM key to an evaluation build. Only volume licence (VL) or retail keys intended for Server editions will convert an evaluation install.
• Edition mismatch: a Standard key cannot convert a Datacenter evaluation, and the reverse is equally unsupported. Match the edition family exactly.
• Trial expired: if the 180-day window has passed, extend it with slmgr /rearm (up to five times) before attempting the DISM conversion.
• Server Core: the same commands work on Server Core; simply run them from the local Command Prompt or a remote PowerShell session.

For activation errors that persist after conversion, our Windows Server 2022 activation troubleshooting guide covers KMS, MAK and Active Directory-based activation scenarios in detail. If you are weighing up the broader release, the eight key features of Windows Server 2022 is a useful primer, and the differences between Server 2019 and 2022 guide will help if you are planning a migration rather than a fresh deployment.

When Conversion Is the Right Choice

In-place conversion makes sense when the evaluation install has been configured with roles, shares, certificates or applications that would be expensive to rebuild. For brand-new deployments, a clean install from licensed media is often cleaner and gives you a known-good starting point. Either way, browse the full range of Windows Server and CAL licences to find the edition and user access licences that fit your environment.

Best regards,
The Licendi Team