SharePoint and OneDrive: Important change to sharing files with external users

Microsoft has changed the sharing behavior for external recipients in SharePoint and OneDrive. This change affects all employees, students, and teaching staff who currently share files or folders with non-HM members.

What does this mean for you?

• Microsoft is enforcing the new sharing logic effective immediately.
• Existing external sharing links no longer work; an “Access Denied” message will appear.
• All externally shared content must now be re-shared.

What do you need to do?

• Review your existing external shares.
• Reinvite external partners.
• Inform your external contacts that old links no longer work.