How to make the files you shared in Office 365 undiscoverable from othe user’s OneDrive?

Step 1: Sign into https://portal.office.com/

Step 2: Navigate to Delve or access https://delve.office.com/

Step 3: Click on the settings gear icon on the top-right corener of the page.

Step 4: Click on Feature settings on the next page.

Step 5: Turn Off the Show documents in Delve and in the Discover view in OneDrive for Business option.