Hello,
Unfortunately, you cannot activate Windows Server 2022 Evaluation with a Windows Server 2019 Standard retail key. Retail keys are typically version-specific, meaning a key for Windows Server 2019 will not work for Windows Server 2022.
If you prefer to use your existing Windows Server 2019 Standard key, you can download the ISO from the Microsoft Evaluation Center. Here’s how:
Visit the Microsoft Evaluation Center. Windows Server 2019 | Microsoft Evaluation Center
Select the appropriate edition and download the ISO file.
Create a bootable USB drive or DVD with the ISO file.
Install Windows Server 2019 on your server and use your retail key for activation.
Best Regards,
Yanhong Liu
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.