Does the functionality exist in NetVault to backup and restore ESXi host configuration data?
NetVault does not backup ESXi Host Configuration data. This functionality does not exist within NetVault.
Via the VMware Plugin, NetVault backs up VM's residing on ESXi hosts, on an image level.
Via the Built-in File System Plugin, NetVault backs up VM's residing on ESXi hosts, on a file level.
To backup and restore the ESXi Host Configuration data please navigate to the following VMware KB