Windows server 2012 R2 activation on Hyper-V

Hi,

I have one Windows Server 2012 R2 Standar Edition Licence, It includes 2 VMs.

I have two virtual machines on the phisical server running Windows Server 2012 R2 Stantad Edition but I am not able to Activate Windows.

I've found one document to activate windows thought AVMA but it appears only applies to Windows Server 2012 Datacenter edition. I run the command

slmgr /ipk DBGBW-NPF86-BJVTX-K3WKJ-MTB6V

and popup appears with the message : Installed product key XXXXXX succesfullybut, the requirement to activate windows is still present.

Any idea?

Thank you in advance.

Regards