I want to enable (set to true) memoryHotAddEnabled and cpuHotAddEnabled on the vCenter Server Appliance.
I can't user powerCLI since it needs a vCenter Server Appliance to connect to and to enable HotAdd the VM needs to be powered off.
I guess my googlefu is lacking.
Actually, you can connect PowerCLI to a host instance of ESXi without needing to go through vCenter.
Otherwise, I would enable SSH and use esxcli to make the change.