I'm interested in hearing how others have handled alerting on non-node specific events. It seems like there should be an option to run a powershell script from the "I want to alert on" dropdown within the alert trigger definition.
A example:
In a Citrix environment we have profiles on an SMB share. If the share become unavailable for one of a hundred reasons the citrix servers will log an event. If I make a component monitor and apply to all of the citrix servers, and the share become unavailable, I'll get hundreds of alerts (one for each node). Alternatively, I can write a script that enumerates through the nodes looking for this event and if seen reports back once.
Don't get hung up on my example by trying to suggest other ways to monitor an SMB share. I'm simply interested in how others might be handling non-node specific alerting.