NetVault Server was missing from the Clients window on the left hand side and was listed under the Available NVBU Clients window on the right hand side.
Viewing a log from a job in the Job Management window would show no log entries.
The backups were still running and completing as scheduled.
Performed the following steps to resolve the issue:
1] Stop the NetVault Services (NetVault Configurator - Services tab).
2] Amended the ...\NetVault Backup\config\clients.txt file to include the NetVault Server name at the top of the list and save that file.
3] Start the NetVault Services.
4] Launch the NetVault Console - Client Management and you should now see the NetVault Server on the left hand side at the top of the available Clients window.
