Use the profile card in OneDrive for Business and SharePoint in Office 365 to update your profile, quickly get in touch with people, and to see information about them and documents they’ve worked on recently. You’ll only see documents you already have access to in Office 365. To bring up a person’s profile card, simply hover over or click their name. Clicking on one of the sections in the card will bring up the expanded view of the profile. Here you can see more detailed profile information and filter through recent files the person has shared with you in OneDrive for Business and SharePoint in Office 365
Note: The expanded profile card is available in OneDrive for Business and SharePoint in Office 365 only if your organization has opted in to the First Release program.
Who can see my documents?
Only you can see your private documents on your profile card. Others will only see documents they already have access to in Office 365. You will see a 'people' icon next to documents that you have created or modified and that others have access to.