OneDrive Copilot Cross-File Answers and Agent Updates

The October 20 OneDrive expansion adds cross-file analysis, interactive reports, reusable skills, and HTML/Markdown editing, alongside broader collaboration changes; rollout timing remains worth tracking. A separate File Explorer update removes eight Copilot shortcuts from mid-November while retaining Ask Copilot and other access points. These are concrete workflow changes, but repeat coverage of the same announcements should be avoided.