If you’ve licensed Microsoft 365 Copilot, or you’re seriously evaluating it, you’ve probably already heard the headline concern: Copilot sees what your users can see, and most tenants have accidentally granted far more access than anyone realizes.
That’s the real work of Copilot readiness. It isn’t technical integration. It’s the permissioning debt accumulated over a decade of “quick share a link with the team”.
Here’s the shortest path from curious to pilot-ready.
1. Run an oversharing report before anyone opens Copilot
Before any pilot cohort touches Copilot, run an oversharing report across SharePoint and OneDrive. You’re looking for:
- Sites where “Everyone except external users” has access.
- Files shared with anonymous links that never expired.
- Orphaned sites with no owner.
- Confidential content sitting in public Teams.
Microsoft’s SharePoint Advanced Management add-on makes this easier. So do third-party tools like AvePoint or ShareGate. Which one you use matters less than actually doing it.
2. Establish a sensitivity-label baseline
You need at minimum three labels: one public, one internal, one confidential, with DLP rules attached. Auto-labeling on top of that catches content your users wouldn’t think to label themselves. A minimum baseline first, nuance later.
3. Fix the top 5% before you fix everything
Your oversharing report will produce thousands of findings. Don’t boil the ocean. The top 5% by risk (usually: HR, finance, legal, and anything sitting in public-by-default Teams) is enough to let a pilot cohort loose safely. The long tail becomes an ongoing governance workstream, not a blocker.
4. Pick a pilot cohort with measurable goals
The mistake most organizations make is running a pilot with “see if people like it.” Instead:
- Pick 20–50 users from two or three distinct roles.
- Define per-role outcomes (“reduce contract review time by X%”, “cut meeting-summary effort to zero”).
- Instrument baseline metrics before you turn Copilot on.
Without pre/post measurement, you’ll end up with anecdotes instead of a business case.
5. Plan for the long tail
After the pilot, the question becomes: where does Copilot plateau? For most organizations, the answer is “when it needs data that lives outside Microsoft 365.” That’s when Copilot connectors, Copilot Studio agents, and eventually a domain agent built for your business earn their keep.
If this sounds like a lot of work: it is. But it’s mostly the work you were going to have to do anyway once the next compliance audit landed. Copilot is just the forcing function.
If you want a hand, get in touch, or read about our Copilot readiness engagements.