A Service, or SRV, record defines services that are available within the zone, such as LDAP.
An SRV record requires a name by which it's known in Address Manager. You can set the time-to-live (TTL) for this record to an override value so that the record has a longer or shorter TTL. A comment field is also included.
This method attempts to link to an existing host record. If an existing host record cannot be located, the method attempts to link to an existing external host record. If neither can be located, the method fails.