We cannot finish the virtual hardware upgrade while the virtual machine is powered on. Hence, we need to power off the virtual machine for an immediate upgrade. If you have a large number of virtual machines, then you can schedule the virtual hardware upgrade to happen during the next reboot of the virtual machine; for example, a reboot during the next patch cycle.
Prepare a list of virtual machines you would like to perform the virtual machine hardware upgrade on.
The following procedure will walk you through the steps required to schedule a VM hardware upgrade: