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Thank you for providing the additional information.
Based on your description, the key point is that you are trying to activate Windows Server 2022 Standard using a Windows Server 2025 Standard product key.
While licensing rights and product activation are related, they are not necessarily the same thing. The activation method and product key must be appropriate for the Windows Server version, edition, and licensing channel installed on the server.
For example, Microsoft publishes different KMS client keys for Windows Server 2025 Standard and Windows Server 2022 Standard.
The errors you are seeing indicate that the supplied product key is not being accepted for the installed or target product:
- DISM error 1605: "The specified product key is not valid for the target edition."
- 0xC004E016 when attempting to install the key.
As a first step, I recommend confirming exactly which edition and license type is currently installed. The following commands can check the current edition and whether the installation is an Evaluation edition:
DISM /online /Get-CurrentEdition
You can also run:
slmgr.vbs /dlv
If the server is already running the non-evaluation Windows Server 2022 Standard edition, you should not need to run /Set-Edition:ServerStandard because there is no edition conversion to perform.
slmgr.vbs /ipk for switching between retail, volume-licensed, and OEM licensing while keeping the same Standard or Datacenter edition.
In this situation, I recommend confirming that you have the appropriate Windows Server 2022 Standard key or activation method for your licensing channel.
For volume licensing, volume licensing keys can be obtained through the Product Keys section for the applicable licensing agreement or through the Microsoft Activation Center.
- If this is an OEM license: I would recommend checking with the server manufacturer or OEM that supplied the license regarding the applicable downgrade and activation options.
- If you have already confirmed that you are using the appropriate Windows Server 2022 key and it is still being rejected: The next step would be to contact your license provider or the Microsoft Licensing Activation Center. They can validate the specific product key and licensing channel. It is a recommendation to contact the Activation Center when a MAK cannot be validated.
I would also avoid relying on the PYXFW prefix alone to determine whether the key is appropriate for Windows Server 2022 Standard. The complete key and its associated licensing agreement/channel would need to be verified by the appropriate licensing provider.
References:
Downgrade Rights Licensing Guidance
Convert Windows Server editions and license types | Microsoft Learn
Troubleshoot Windows activation error codes - Windows Server | Microsoft Learn
Key Management Services (KMS) client activation and product keys | Microsoft Learn
Plan for volume activation | Microsoft Learn
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