Hi there. This isn't really a Symantec PGP Universal question, but a Symantec PGP Desktop question.
Short answer, the information stored in the Desktop application is either the FQDN you entered when you generated the msi, or what you have modified it as. Default here if the Universal installation is as per standard, is that it's the FQDN, and DNS-queries are handled by the OS, not the application. Any issues here might be resolvable via a dns flush on your clients.