When you share confidential files with others through your work account, it is important to keep track of who has access to the file.
Open OneDrive on Office365.
Locate the file you would like to manage.
Click on the vertical ellipsis to view more information.
In the drop-down bar, click Manage access.
To stop sharing with all users, click Stop sharing at the top.
To stop sharing with specific users, click on the down arrow next to the list of users with access
Click the X next to the user to remove access.
Click Remove to confirm.
To share with additional users, click on the Share button and enter their emails.
Click Send to confirm.