Configure virtual machine startup-shutdown when starting-stopping ESXi
With a default configuration of ESXi no virtual machines will be started when you start your host. In a cluster this also is not most likely necessary because you would migrate virtual machines to another host before you shutdown your ESXi-host. And of course in that case there are no virtual machines to start. But when you do not have a cluster and/or virtual machines are located on your server's local hard disk then it might be useful to start some virtual machines automatically when your server starts.