Note:
A DNS zone requires one Name Server (NS)
record. If you have only one NS
record in a zone, you cannot remove that NS
record from the zone.
However, If you are not using Ensim Pro as your DNS name server, you
do not need to do anything with the DNS settings of Ensim Pro; the settings
shown in the DNS section of the Appliance Administrator GUI are not used.
For more information, see:
Introduction to DNS and name servers
Using Ensim Pro as a DNS server