When a power outage has been detected, the registered Automated Operation Process automatically starts, switches to maintenance mode after the virtual server has stopped, and then shuts down the ESX Server.
Start the ESX Server after the restoration of power has been confirmed.
Note
As maintenance mode is the current mode at the time of the shutdown, when the ESX Server is started it starts in maintenance mode. Therefore, after starting ESX Server, cancel maintenance mode. Before canceling maintenance mode, confirm that the vCenter Server and the Management Server are started.