If you log in to OneDrive from a PC, you tend to remain signed in, yet the ability to remotely log off a device or session is strangely missing. This makes your files vulnerable to access or deletion.
Other services, such as Google Drive, have this capability.
Example: You're at a friend's house and you use their PC to log in to OneDrive and download something, but don't click 'logoff.' Your friend now has access to all of your OneDrive files and can read, change, or delete the files. With remote logoff, you could use your app or PC to select your recent login and remotely log off.