If you have physical access to the host or remote access to the direct console, you can use the direct console to access the ESXi license key.
Procedure
- ♦ From the direct console, select View Support Information.
The license key appears in the form XXXXX-XXXXX-XXXXX-XXXXX-XXXXX, labeled License Serial Number.Note: The physical machine serial number also appears, labeled Serial Number. Do not confuse the license key with the physical machine serial number.