A Microsoft file hosting and synchronization service.
Hello Michael,
Welcome to the Microsoft Community.
If you and your colleague use the same account on 2 devices, she will be able to see your recent modified files in any Office application, and everything you've done in OneDrive. Even the Windows settings will be synced to be the same. So if you have any privacy concerns about this point, we recommend you do not try to use the same Windows logon accounts.
Best Regards,
William.Y | Microsoft Community Support Specialist