Microsoft Defender for Endpoint Device group question
I know Defender in general is extra user friendly but for the Defender for endpoint to work properly, do I need to put all devices in a machine group and set a remediation level? All the training videos I have watched tells me I have to put the devices in a Device group in settings and set a remediation level. I didn't set it up and it still seems to quarantine unwanted software or malicious software. Can someone why the device group and remediation level are necessary?