How does a Device Agents life cycle and status work?

Each Device Agent have a life cycle, you can check it by:

1. Log in to Security Center.
2. Click Asset Manager in the header. 
3. Click Devices
4. Hover over the   icon beside the State to have more information about each state: 
   • Active: Working Properly.
   • Stale: No activity for over a week.
   • Disconnected: No activity for over a month.
   • Disabled: Collection of data is disabled.
   • Removed: Manually deleted.
5. Stale and Disconnected are based on when the Device agent reported last.
   • Device agents that have been in the state Disconnected or Removed, and did not send any data for more than 6 months, will automatically disappear. Those agents will need to be reinstalled in order to become Active again.
6. You can Disable or Remove any Device Agent manually.
   • Click on the edit icon  
   • Click on State under General information and choose to disable, remove or re-activate a device.
7. Done!