There isn't a way to change the MAC address on the server.  For virtualized environments, you will need to either clone or find another way to provide a MAC address for your virtual sessions.  Regards, 
Hello, I know it's a stupid question, but how to change a MAC address on a PE 2950 (broadcom NIC)? I googled for an answer but could not find any. The machine used to run a licensing system, linked to the MAC address. The licensing system has been virtualized, so I had to use that same MAC on the VM. Now I need to assign a new MAC to my machine before I can use it. TIA,  Olivier
Change MAC address on PE 2950