As the groups from the existing server do not exist on the new server, a limited subset of information should be exported/imported as follows:
nhExportLiveExCfg -dciOut /tmp/profilesNew.dci -sections "Calendars,ExceptionProfiles,AlarmRules,MonitoredSubjects,Nms,Operations" -profiles user
This also omits Notifer Rules as these may apply to groups as well, and limits the export to only user created profiles.
This can be imported on the new server using:
nhImportLiveExCfg -dciIn /tmp/profilesNew.dci