vCloud Director Installation and Configuration Guide : vCloud Director Setup : Enter the License Key

Enter the License Key
Each vCloud Director cluster requires a license to run. The license is specified as a product serial number. The product serial number is stored in the vCloud Director database.
The vCloud Director product serial number is not the same as the vCenter server license key. To operate a vCloud, you must have a vCloud Director product serial number and a vCenter server license key. You can obtain both types of license keys from the VMware License Portal.
Procedure
1
Obtain a vCloud Director product serial number from the VMware License Portal.
2
Type the product serial number in the Product serial number text box.