Microsoft 365 Copilot readiness: fix oversharing before you roll out

The real risk

Microsoft 365 Copilot works within each user's existing permissions. That is good design, but most organisations have years of overshared sites, broad groups and links that work for "anyone in the organisation". Before Copilot, nobody found those files. With Copilot, anyone can ask for them in plain language.

Readiness in five steps

1. Find oversharing. Report on sites, libraries and files shared with everyone, broad groups or anonymous links, starting with HR, finance, legal and executive content.
2. Fix permissions. Remove broad access, clean up stale groups and set owners for every site.
3. Label sensitive content. Apply sensitivity labels and data loss prevention to the content that matters most.
4. Pilot with a defined group. Measure usefulness and watch for unexpected access before wider rollout.
5. Govern and train. Publish acceptable use guidance, train users to verify outputs and monitor usage.

Measure value, not licences

Licences are easy to count and hard to justify. Pick a handful of tasks, such as meeting summaries, drafting and search, measure time saved in the pilot, and expand where the value is clear.