A sensor that has not contacted the Falcon cloud will be automatically deleted from the hosts list after 90 days. A sensor that has not contacted the Falcon cloud for more than seven days is considered inactive and will be moved from the Host Management page to the Trash page. An inactive sensor will remain in the Trash page for 90 days before being permanently deleted from the Falcon platform. You can restore an inactive sensor from the Trash page if it contacts the Falcon cloud again within 90 days.