I have enable snmp on my domain controler. Opmanager can monitor CPU, MEMORY, AVAILABILITY ect. but it can`t monitor AD Store, LSASS, NTFRS, NETWORK, PerFormance Counter. I want to know how can I enable those monitors.

I also enable snmp on my exchange server. I also can monitor the above mention monitors on my exchange server. but when I add the exchange monitor I get the status exchange service is Down. Can someon help to fix it?