Managed detection and response (MDR) means someone is watching your systems for signs of an attack and acting on what they find. Antivirus blocks what it recognises. MDR is for what gets past it: a staff login used from another country, an inbox rule quietly forwarding mail, a device doing something it shouldn’t.
Nobody can promise you will never be compromised. What MDR changes is how long an attacker has before someone notices and shuts the door.





