I have a user who can see files she shouldn't. She is obviously a member of a group that she shouldn't be. I didn't set up the Groups or Folder structure. Rather than opening every group and searching for the user, it would be nice to open her account and see what group she belongs to. I would think it would be where you go to add a user to a group - the groups they are in would show a check in the box. You should be able to check or uncheck to add or remove their group access.