Nagios Support Forum

Just need an explanation on below,
define service{
use generic-service
host_name Windows AD
service_description Uptime
#event_handler send_snmptrap
event_handler_enabled 1
check_command check_nt!UPTIME
}

If I comment or uncomment event hander, how this will effect ? Does it have any relation with server or service ?

That depends what you have send_snmptrap defined as. It may attempt to send some form of trap to the windows machine or another. Could you post a copy of the event handler?