Convert Windows Server 2016 from Eval to Standard or Datacenter

It’s finally possible to convert an evaluation version of Windows Server 2016 to a full Datacenter or Standard Edition.
Apparently it only works for the full GUI version of Windows 2016 🙁
Use the generally available GVLK keys from here : https://technet.microsoft.com/en-us/library/jj612867(v=ws.11).aspx

Datacenter : DISM /online /Set-Edition:ServerDatacenter /ProductKey:CB7KF-BWN84-R7R2Y-793K2-8XDDG /AcceptEula
Standard : DISM /online /Set-Edition:Serverstandard /ProductKey:WC2BQ-8NRM3-FDDYY-2BFGV-KHKQY /AcceptEula