Downgrading the purchased Windows Server 2025 for use

Question

Hello,Our company has just purchased Windows Server 2025. Now we are considering downgrading to Windows Server 2019. Is this possible?

Answer 1

Hello 金鸣洲, I am Henry and I want share my thought about your concern.

From your described, this is possible to downgrade. The right to use an earlier version of the software is called "downgrade rights". However, your ability to downgrade and the specific process you must follow depends entirely on how you purchased Windows Server 2025.

Here is a breakdown of the three main license types and the rules for each:

1. OEM (Original Equipment Manufacturer) License

• What it is: Pre-installed on a new server from a manufacturer like Dell, HPE, or Lenovo.
• Downgrade Rights: Yes. You have the right to downgrade to any prior version.
• How to Proceed: You must obtain your own legitimate Windows Server 2019 installation media and a corresponding key. The Server 2025 key will not activate Server 2019. The OEM license gives you the legal right to run the older version, but you are responsible for sourcing the installation materials.

2. Volume Licensing (e.g., Open License, Open Value)

• What it is: Purchased through a Microsoft partner or reseller.
• Downgrade Rights: Yes. This is a primary benefit of Volume Licensing, as stated in the Microsoft Product Terms.
• How to Proceed: You can simply log in to the Volume Licensing Service Center (VLSC) or the Microsoft 365 admin center (under Volume Licensing). From there, you can directly download the Windows Server 2019 installation ISO and get a valid product key for that version.

3. Retail / FPP (Full Packaged Product) License

• What it is: Purchased in a box or as a digital download from a retail store.
• Downgrade Rights: No. Retail licenses do not include downgrade rights. This right is exclusively granted to OEM and Volume Licensing customers.
• How to Proceed: If you have a retail license, you cannot legally downgrade. You would need to purchase a separate, full license for Windows Server 2019.

To proceed, first identify your license type:

• If you bought a server with Windows pre-installed (OEM): You can downgrade, but you must source your own 2019 media/key.
• If you bought through a Microsoft reseller (Volume License): Log in to the VLSC or Microsoft 365 admin center to get everything you need.
• If you bought it from a retail store (Retail/FPP): You cannot downgrade.

For further reading and official confirmation, please refer to these Microsoft resources:

• Microsoft Licensing Brief: Downgrade Rights (PDF): This is a detailed document that explains exactly how downgrade rights work for different products, including Windows Server.
  • Download Microsoft Licensing Brief on Downgrade Rights
• Microsoft Product Terms: This is the definitive legal document for Volume Licensing customers. You can search this page for "downgrade" to see the specific terms.
  • https://www.microsoft.com/licensing/terms/

I hope this information and these keywords help point you in the right direction for your research. Let me know how it goes, and if this answer helps, feel free to hit “Accept Answer” so others can benefit too