Hi DjO),
to use the downgrade rights, you will need to obtain a product key for Windows Server Standard 2019. This key can be obtained from the Volume Licensing Service Center (Volume Licensing Service Center (microsoft.com)) or from your Microsoft reseller. Once you have the product key, you can use it to activate the Windows Server Standard 2019 installation.
To activate the installation, you will need to follow these steps:
- Install Windows Server Standard 2019 using the installation disk.
- During the installation process, do not enter a product key.
- Once the installation is complete, go to the Activation page in the Settings app.
- Click on the "Change product key" link and enter the product key for Windows Server Standard 2019.
- Click on the "Activate" button to activate the installation.
If you encounter any issues during the activation process, you can contact Volume Licensing Support Info. | Microsoft Learn for further assistance.
Hope it helps.
Kind regards,
Lei