Follow these directions to assign your license key.

1. In the left panel of vSphere, highlight the IP address or domain name of your ESXi server, and then click the Configuration tab.
2. In Configuration, select Licensed Featured and then select edit. The Assign License pop-up box appears.
3. In the Assign License pop-up box, bullet Assign a new license key to the host and click the Enter key button. The Add License Key pop-up box appears.
4. In the Add License Key pop-up box, enter your License Key, which was provided when you first downloaded vSphere.
   1. If you do not have your License Key, sign into your account at www.vmware.com to obtain your License Key.