I Have Issue with Microsoft server 2025 Data Center Licence

Question

Dear Support

Kindly i need your support to i can active my license in VMs over Hyper-V should be Data Center LIC unlimited VMC after i installed it over 2 Physical Servers

Answer 1

Hi Amr Tawfik,

Just checking in to see if there’s any update on this issue. If the suggestions helped resolve it, I’d appreciate it if you could click accept the answer. And feel free to reply if you need any further assistance. Have a nice day!

Answer 2

Hi Amr Tawfik,

The first step is to confirm that the Datacenter license has been correctly activated on each physical server. You can check this by running slmgr /dli or slmgr /dlv from an elevated command prompt to verify the edition and activation status. If the host is not showing as Datacenter, you may need to reapply the product key using slmgr /ipk <your-key> followed by slmgr /ato.

Once the physical hosts are licensed, all VMs running on those hosts inherit the Datacenter licensing rights automatically. You do not need to enter separate product keys for each VM. However, if a VM was previously installed with a Standard edition key, you may need to upgrade it to Datacenter using the DISM /online /set-edition:ServerDatacenter /productkey:<your-key> /accepteula command.

Also ensure that your Hyper-V hosts are connected to the internet or to a Key Management Service (KMS) server if you are using volume licensing. Network connectivity issues can prevent proper activation. If you are using Active Directory-based activation, confirm that the licensing objects are replicated correctly across your domain controllers.

If activation continues to fail, I recommend checking the Event Viewer logs under Applications and Services Logs > Microsoft > Windows > Software Protection Platform for detailed error codes. These logs can help pinpoint whether the issue is related to connectivity, key validity, or edition mismatch.

You can try and let me know how it goes. Feel free to let me know if you need further information. If you find this answer helpful, please consider clicking Accept Answer so I know your issue has been resolved.

Jason.

Answer 3

To activate your Windows Server 2025 Datacenter license for virtual machines (VMs) over Hyper-V, ensure that you have properly activated the physical servers hosting the VMs. Here are some key points to consider:

1. Host Activation: Each physical server must be activated with a valid license key. You can obtain these keys from the Microsoft 365 admin center or your OEM provider.
2. Unlimited Virtualization Rights: If you have Windows Server Datacenter licenses, you can license the physical cores on the host to run as many VMs as your hardware allows. This provides unlimited virtualization rights, which is beneficial for high-density VM environments.
3. Automatic Virtual Machine Activation (AVMA): If your physical host is running Windows Server 2012 R2 or later, consider implementing AVMA. This allows you to activate VMs automatically without managing individual product keys. The VMs will be activated when they start up on a properly activated host.
4. Failover Clusters: If you are using a failover cluster, ensure that all hosts in the cluster are activated for the VMs to remain activated.

If you continue to experience issues, you may want to check the activation status of your VMs and ensure that they are running on a supported Azure Stack hypervisor if applicable.

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References:

• Considerations for Windows Server Datacenter edition
• Automatic Virtual Machine Activation in Windows Server