Passcode feature for securing one drive should not go with unistallation of app
The passcode feature secures the one drive app, with this feature even if one knows the phone password/pin/ fingerprint, one cannot ***** into one drive without filling the right passcode. But to ***** it one only needs to uninstall the app and re-download it. There will be no requirement of filling the passcode then. This makes passcode useless!