To manage ESX 3.x/ESXi 3.5 hosts, you must configure vCenter Server to use a license server.

You must have a license server installed. You can download the VMware License Server from the VMware Web site.


In vCenter Server, select Administration > vCenter Server Settings.


In the License Server text box, enter the port number and license server machine name, as in port@host.

For example:


If you want the hosts and vCenter Server to use the same license server, select the Reconfigure ESX 3 hosts using license servers to use this server check box.


Click OK.