Hello Yellow Boy,   By default, zones in a Windows based DNS server are configured to only allow secure dynamic DNS updates - this means the client uses kerberos to authenticate to the DNS server where it can create and update it's own host records. Linux based clients do not have this capability in their DNS clients, so one needs to either manually create the records or change their DNS zone where the client is registering to allow non-secure updates. Please let me know if this helps.
On the appliance, ver 3.4, I'm getting error when trying to register appliance with DNS any suggestions?   Error: Failure occurred during network interface configuration: Failed to apply DNS settings for ens160Response from server: Update failed: REFUSED   [IMAGE]
Dell OM Enterprise Register with DNS