Symantec Endpoint Protection
client status icons

You can check the notification area icon on the client to determine whether the client is connected to a management server and adequately protected. The notification area icon is sometimes referred to as the system tray icon.
The icon is located in the lower-right hand corner of the client computer desktop. You can also right-click this icon to display frequently used commands.
Client status icons
Icon
Description
The client runs with no problems. It is either offline or unmanaged. Unmanaged clients are not connected to a management server.
The client runs with no problems. It is connected to and communicates with the server. All components of the security policy protect the computer.
The client has a minor problem. For example, the virus definitions may be out of date.
The client does not run, has a major problem, has an expired license, or has at least one protection technology disabled.