If a device has maintenance windows applied that you do not want applied, you can clear them from within the Device Details window. This action will delete all selected maintenance windows that were not added through rules on your chosen devices.
- Click Views > All Devices.
- Click the name of the device.
- Click Add Task > Maintenance > Clear Device Level Maintenance Windows..
- Click to select the check boxes for the maintenance window types to remove.
- Click OK.