Go to Network Monitoring-> Admin-> Quick Configuration Wizard.
Select Assign/Remove a Notification Profile and click Next.
Select the required Notification Profile that you want to remove from the devices and click Next.
Select the Manually group devices option and click Next.
Select the devices (CTRL + RIGHT CLICK to select multiple devices) from the Devices for which the profile is assigned box and move to Devices for which the profile is not associated box.
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