Microsoft study links heavy Copilot use to more document work than email work
Reviewed by Helen Jones
Microsoft Research analysed Microsoft 365 usage traces across large companies and compared workers before and after they started using generative AI. People with more than 100 AI uses over a 20-week period showed a 21.2% rise in productivity-oriented app actions and a 7.1% rise in communication actions. The mix of work shifted. Activity moved toward individual documentation work, such as creating and editing content in apps like Word. Communication changes were smaller and mixed, including less time spent reading and organising email among some users. Effects were strongest for heavier users, roughly in the 100 to 500 use range. The study is observational digital-trace research. It does not pin gains to a single Copilot feature or fully control for company differences. Companion survey figures about high-value work sit outside the measured trace results.
Before this kind of evidence, many teams treated Copilot as a side experiment while the real day still ran on inbox triage, noisy Teams threads, and tasks split across Outlook flags, To Do, Planner, and meeting notes. The fear was missing messages. The quieter problem was never having one place where new work landed. What changed is the measured tilt: heavy AI use inside Microsoft 365 is associated with more production actions than communication actions, especially solo document work. That means more drafts, recaps, and half-finished artefacts can appear faster than your review habits can absorb them. If flags, chat follow-ups, and Planner items already compete, higher output volume without a capture routine simply multiplies open loops rather than clearing the day.
Analysis
Treat this as a trap to avoid, not a mandate to use Copilot more. For one week, whenever you accept an AI draft or a meeting leftover, force it into a single default: personal To Do for work only you own, Planner for shared work, or delete it. Do not leave the residue in chat, flags, and documents at once.
Source note
Pulse published by Collab365 Spaces, reviewed by Helen Jones on . Cite as "Microsoft study links heavy Copilot use to more document work than email work", Collab365 Spaces. 2 sources referenced.