We recently made a small but important change in how OneDrive and Office.com handle links to shared content. This won’t change how customers use either service, but on the backend, this update will help better secure documents that customers share.
The new update resolves an issue that could allow a shared document to be accessible by a third-party administrator in certain circumstances. If a customer shared a document or commented on a shared file that contained a hyperlink to a third-party website, and the recipient of the document opened the embedded link, then the administrator of the third-party website could have received header information that could have allowed them to access the document.
