DatacenterEvaluation to Datacenter. First activate with the eval license.
1. Uninstall existing key. (slmgr /upk)
2. Install LTSC Key using slui (slui /ipk WMDGN-G9PQG-XVVXX-R3X43-63DFG)
3. slmgr /ato
4. Convert Edition Evaluation to Retail (DISM /online /Set-Edition:ServerDatacenter /ProductKey:WMDGN-G9PQG-XVVXX-R3X43-63DFG /AcceptEula)
5. Go to System Info -> Change Product Key, and use youre own key!
6. Activate
7. Done
