Shared Files

Unwanted shared files and links in OneDrive cannot be fully prevented because anyone who knows an email address can send a sharing link. These items can be ignored safely as long as they are not opened, and malware in them cannot run remotely just by being shared.

For a personal OneDrive account, the practical options are:

1. Turn off or reduce notifications so the shares are less intrusive.
2. Delete or ignore the shared items instead of interacting with them.
3. If any shared file or folder is offensive or illegal, report it to Microsoft for review:
   1. Go to the OneDrive website and sign in with the Microsoft account.
   2. Open the Shared view.
   3. Right‑click the offensive or illegal file/folder and select Report a concern.
   4. Choose a reason, add any details, and select Report.
   If reporting anonymously or without signing in, use the anonymous Report Abuse form linked from the same article.

If the content is coming from a work or school account associated with a paid Microsoft 365 subscription, the organization that owns that account is responsible for handling abuse; in that case, contact the Microsoft 365 administrator for that organization.

There is no supported way in the provided documentation to globally block all future OneDrive shares from unknown senders.

References:

• Report a concern in OneDrive
• Receiving unsolicited OneDrive File/Folder shares, how do I stop it? - Microsoft Q&A