windows – activate server

DISM /online /get-targeteditions

DISM /online /get-currentedition

https://docs.microsoft.com/en-us/windows-server/get-started/kmsclientkeys

KMS_2019

DISM /online /Set-Edition:ServerStandard /ProductKey:N69G4-B89J2-4G8F4-WWYCC-J464C /AcceptEula

KMS_2016

DISM /online /Set-Edition:ServerStandard /ProductKey:WC2BQ-8NRM3-FDDYY-2BFGV-KHKQY /AcceptEula

DISM /online /Set-Edition:ServerStandard /ProductKey:XXX-XXXX-XXXX /AcceptEula

slmgr /ipk XXXX-XXXX-XXXX