Upgrading VMware ESXi from 6.5 to 6.7U3 without vSphere Client March 21, 2020, 1:41 a.m. Updated March 21, 2020, 9:45 p.m. vmware esxi This is a quick step by step guide on how to upgrade a VMware ESXi Hypervisor from 6.5 to 6.7U3 without having a vSphere server and client by using esxcli