We currently have a dropbox account managed by a member of staff that has recently left. I have managed to change the email address so that is done and have changed ownership of the internal folders to another colleague. However this morning as a test she wasn't able to log in via the internet which was good as we had changed the email address and password, yet when she clicked on the dropbox icon app she managed to gain access into the account and was then logged in as my colleagues name who is now in charge of the account. How do I go about removing my old colleague completely but still keeping all our files and folders available for our use.