Source: Microsoft article See who a file is shared with in OneDrive or SharePoint
You can see who a OneDrive for work or school, SharePoint, or Microsoft Teams file or folder has been shared with at any time.
- Within your OneDrive or SharePoint site on o365.uthsc.edu, select the file or folder in your document library.

- Above the list of files, select Share.
- The Share window opens.

- A group appears at the bottom left of the Share window if the item is currently shared with other people.

- Click the X in the window to close it.
- Each circular item in the bottom left represents a person or group that the file has been shared with.
- Hover your mouse over this area to see the Manage access summary of who has access to the file.
- Click the list to see more details about who can access the file. See Manage access to a file or folder later in this article for more details.