When you go to registeronce to get your 2010 network license, you need to supply a server ID.
A server ID is the MAC address (also known as the Ethernet address or Physical address). You can find the server ID in LMTOOLS. Look on the System Settings tab, at the Ethernet address box. Sometimes you may see more than one Ethernet address (eg “0000DEADBEEF 00DE00AD00EF”). In that case, use the ipconfig /all command to check which one to use (just make sure you use that address of a physical network adapter).
Use the MAC address of a physical adapter, not a virtual adapter.