A device management method, for a network system that comprises devices connected to a computer network, a device management server to manage the devices, a plurality of general management consoles connected to the computer network, a supervisor management console accessible by the device management server, a database, connected to the device management server, that includes enterprise data associated with each of the general management consoles and the device data associated with the enterprise data for each of the devices, a console manager for an intermediate transfer of data between the general management consoles or the supervisor management console and the database, the device management method comprising steps of:
- the general management consoles issuing a connection request to the device management server;
- the console manager obtaining information, including enterprise IDs for the general management consoles, and searching the enterprise data to verify at least some of said plurality of general management consoles as verified general management consoles;
- and
- the verified general management consoles receiving permission to offer, and offering a service to individual devices, or a group thereof, whereat device data are available that are associated with the enterprise data, which are designated by the enterprise IDs.