My End user was unexpected power failure, then all ESXi unexpected shutdown, when the power resume, the esxi started, but all VM guest auto power on, End user want to power on VM guest manually.
we have no setting of autostart VM.
So how can we prevent the VM auto start when esxi host unexcepcted shutdown by power failure.
You said "all ESXi servers shut down". I assume these hosts are configured in a cluster. Is High Availability enabled on the cluster?
You can disable HA on the cluster, or you can override it on a PER VM basis.