We are using vmware probe to monitor our VMWARE infrastructure.
Last week two ESXi host were powered off, and no alarm was generated.
The monitor we are using is the IsConnected, and the threshold is set to generate an alarm when the threshold is equal to 0.
Release : 20.4
Component : UIM - VMWARE
The IsConnected monitor has three possible values
0 - disconnected
1 - connected
2 - not Responding
When an ESXi host is powered off, the monitor will return 2 (not responding)
The best approach here is to generate an alarm when the threshold is not equal to 1. That will cover both options (disconnected and not responding)