Per-client quiet hours are only safe with one exception rule. How to define it, and what happens to everything you suppressed.
Discovery is not a port scan. A tour of what the plugins detect on a host and how each finding becomes a check bound to a fix.
You do not have to throw away fifteen years of check plugins to get remote access, patching and governed automation. The migration path that keeps them.
A rebooted server used to mean forty emails. Alert noise is a design problem with four known fixes, and a harder question most tools cannot answer.