Using host certificate checking, you can configure ESXi hosts to verify each other's identities, helping to ensure a more secure environment. Host certificate checking is required for ESXi hosts on which fault tolerant virtual machines reside.

If you installed VMware vCenter Server version 4.1, host certificate checking is enabled automatically. If you upgraded from a previous version, you must perform the procedure manually. During this procedure, you will be presented with the list of hosts and their certificates for verification. You can verify the host certificate before committing the certificate checking enablement. Hosts not verified in this step must be manually verified and reconnected.


Connect vSphere Client to vCenter Server.


Select Administration and select vCenter Server Settings.

The vCenter Server Settings window appears.


Click SSL Settings in the left pane.


Select the vCenter requires verified host SSL certificates box.


Click OK.