Copilot as a junior collaborator

I’m using Copilot in Word with OneDrive/SharePoint version control. Copilot should be able to act as a constrained collaborator identity: always editing with Track Changes on, never accepting changes, and operating under existing SharePoint permissions. Version history already provides rollback, and the controlling author retains full authority. This would enable true collaboration without increasing risk and mirrors how teams already work with junior editors. This conversation documents a real legal/financial drafting workflow where this capability would materially improve Copilot’s value.