VMware ESXi host, which is running the free edition of VMware, is not shutting down when commanded to by PowerChute Network Shutdown.
PowerChute Network Shutdown (PCNS) version 2.2.3, 2.2.4, 3.0, 3.0.1, 3.1, 4.X
VMware ESXi versions 3.5, 4.x, 5.x, 6.x
The free edition of VMware ESXi provides read-only access to the API functions. Without write access to the API functions, PowerChute cannot issue a command to shut down an ESXi host.
To make PowerChute Network Shutdown work properly you will need to purchase a license for ESXi.
"VMware ESXi host is not shutting down when commanded to by PowerChute Network Shutdown running on 4.1 & 5.x."
You can also find more information in Kbase FA159768 "Shutdown VMWare ESXi 4.1 unlicensed server with PowerChute Network Shutdown"