Microsoft is adding anchored comments to the PDF viewer in OneDrive and SharePoint on the web. Users can attach a comment to a specific spot on a page, to selected text, and collaborate through replies and @mentions — bringing PDF review to parity with commenting in Office documents. This feature will be on by default and requires no admin action.
Dates
GA Oct 2026
Apps
SharePoint, OneDrive
Type
End-user app
Platforms
Web
Release phases
General Availability, Targeted Release
Cloud instances
Worldwide (Standard Multi-Tenant), GCC, GCC High, DoD