Activate your Windows Server 2019 Evaluation
Feb 10, 2024
Follow below steps
1. Run PowerShell as Administrator
2. Run the below command
DISM /online /Set-Edition:ServerStandard /ProductKey:N69G4-B89J2–4G8F4-WWYCC-J464C /AcceptEula
DISM /online /Set-Edition:ServerStandard /ProductKey:N69G4-B89J2–4G8F4-WWYCC-J464C /AcceptEula