When you connect the vSphere Client directly to an ESXi host, you can view and assign license keys, see which features are licensed on the host, and put the host in evaluation mode. Access the ESXi License Key from the vSphere ClientIf you are not local to the host and cannot access the direct console, use the vSphere Client to access the ESXi license key. Assign a License Key to an ESXi HostYou can assign a license key to an ESXi host from the Licensing page in the vSphere Client. View Which Features Are Licensed on a HostYou can view which features a host is licensed to use. Set an ESXi Host to Evaluation ModeIf you have assigned a license key to an ESXi host, you can switch to evaluation mode to explore the full set of features that are available for the host.. The License Key of an ESXi Host is ReplacedThe license key that you assigned through a direct connection with the vSphere Client to an ESXi host changes.