If you want to give users a grace period immediately after the user's device is put in quarantine, then you need to customize the message template for the grace period.
If you have set up the DeviceID registration alert, then you will receive an email or text message when a new device has been registered
In the Admin Console, navigate to Administration \ Device Quarantine
Click "..." to bring up the device's context menu
To view the device's properties, select "View" from the context menu
To activate the device, select "Activate" from the context menu.
