Review the correct version VMware ESXi Upgrade documentation to ensure any pre-requisites are identified/actioned, that the system hardware complies with ESXi requirements of the new version, ensure any SAN is disconnected to name a few.ĭrain all the VM's off the host by putting it into maintenance mode. Online and Offline methods are both shown. This article focuses on how to upgrade an HP ProLiant Gen10 server from ESXi v6.5 to v6.7 using ESXCLI but could be used for any supported upgrade.