Hi. Trying to audit current alerts in out infrastructure.
And I have question about "I want alert on..." field - what it is means?
For example, I have "VoIP Infrastructure" here:

If I choose it, I can check the list of all nodes in this "VoIP Infrastructure"... group? property?
There is only one node:

So If I edit this node, I can't see any links to "VoIP Infrastructure".
But somebody, somehow added this node to "VoIP Infrastructure".
I've checked every SAM settings corner, all templates, all group. But "VoIP Infrastructure" is not an app, is not a template and is not a group.
What is it? And how can I assign other nodes to it?