When an HTTPS unit is added with a hostname, the hostname will be used to communicate to the unit.
When in HTTPS, the hostname is always used to communicate with the unit and to validate the certificate’s subject name. If the Archiver is unable to resolve the hostname used, it will then try to connect using the last known IP address.
NOTE: if the hostname points to an invalid IP address, it will be used and the connection to the unit will fail.
In HTTP, the hostname will be used to resolve the unit's IP address unless the Allow hostname address resolution option is cleared in an Axis unit or if UseDNS is added to the extension's advanced settings with value "0" for the other extensions.