MAC address of your computer or license server. Please call your IT Department or apply following instructions to obtain MAC address for Windows OS: 1. Open a terminal via Start > Command Prompt 2. Type ipconfig /all in command line 3. Find Ethernet adapter Ethernet: Physical Address (i.e. 18-31-BA-DE-85-00) Filling in this field is optional: if for security and/or corporate policy reasons it is not possible to provide this data here, the course tutor will contact you directly.