Copied from LINK PUBLIKOVÁNO 23 SRP ’17 , AUTOR: TOMAS KALABIS VMware vSphere – How to activate Windows Server OEM licence in virtual machine I have installed a Windows Server 2012 R2 with a Fujitus OEM licence on ESXi 6.5, but when i try to activate this operating system i got always an error with licence key. The solution is add following lines to the .vmx file of affected VM.