When you do a concordance search in Passolo, even if you have the option "Show system fields" in the TM settings in the Trados Studio add-in enabled, system fields are not displayed (nor are "custom fields"). Only when searching for Fuzzy Matches, the system fields are displayed, although it would make sense to show it especially for concordance search results too, like it already is the behaviour in Trados Studio. Please see attached picture for details.