How to change search results to show different Hostname

Hello. I was wondering if it is possible to modify our openfire server so that when a user performs a username search in spark that the results to not show the hostname, or if we can change the hostname to something other than the PC name. For example in the attached screenshot it shows the server name. I would like to have it show something like username@companychat or something catchy without having to change our Windows computer name. Let me know your thoughts!