Then enter DISM /online /Set-Edition:ServerStandard /ProductKey:ENTER-YOUR-SERIAL-KEY-HERE /AcceptEula.
Open an elevated command prompt, and type (or copy) DISM.exe /Online /Get-TargetEditions.
2: Then upgrade to the listed edition by typing: DISM /Online /Set-Edition: /ProductKey: /AcceptEula. 1: Get a list of available version upgrade paths by typing: DISM.exe /Online /Get-TargetEditions. Server 2019 Activation Error: Run “slui.exe 0x2a 0xC004F069” to display running Microsoft Windows non-core edition, run 'slui.exe 0x2a.