Q. I need to create a DNS record internally for an external zone but don't want to clash the entire DNS zone. What can I do?
A. It's very common that a DNS name should resolve differently within an organization than from the Internet. For example you may want www.
In my example below I wanted www.savilltech.com to resolve to an internal host on my network but still enable other savilltech.com names to resolve. As can be seen I added a zone named www.savilltech.com then in the zone create a host record (A) with no name that then resolves to the desired IP. If any other savilltech.com name is used internally there is no matching zone on the internal DNS and it will resolve to the Internet DNS hosting savilltech.com.
The same approach can also be useful for ADFS server names etc that should resolve differently on the Internet and internally.