S/MIME functionality available in Outlook for iOS TestFlight

Ross Smith IV - can you tell me if it's possible in iOS Outlook how to view/remove certificates I have installed (mine, not for other users)? I'm having issues when viewing signed messages as the body of the email simply doesn't appear, but the subject and email shows 'signed'. (The first line is visible in the preview, though). I often get errors about not being able to save drafts. I do have a case open with Support in the app, but they're insistent that the certificates are installed to iOS and visible in Settings>General>Profiles, which of course is incorrect as iOS apps don't work that way! The other thing is, I have: reset the account, deleted the account, uninstalled the app and re-installed it...and the certificate seems to still be 'there' which tells me my uploaded PFX is stored somewhere other than locally with this app. Where and how can I manage it?