The Management Status page (Device Viewer > Settings & Status > Management Status) displays the same visual indicators as shown for the device in the Network Explorer > Discovery page. Each discovery indicator shows a related status message.
Device credentials are a critical element in ensuring a device can be managed. You can add SNMP and CLI credentials to any individual discovered device. For more information, see Adding and Testing SNMP Credentials for a Device and Adding and Testing CLI Credentials for a Device.