I really need some help. We need to monitor ESXi 5.1 and I followed the instruction of this link
Both OS IP and IMM IP are fully accessed. I tested it by removing power supply and disk from ESXi server but there is no any error sent to the system.
We integrated ISD with ITM and found that health state is unknown (It must be OK). I have no idea how can I fix it or I miss some prerequisite to monitor ESXi server. Please advice me. Much appreciated. Thank you.