Copilot for Legal: What to Fix Before You Turn It On

AI Where Lawyers Already Work

Microsoft has begun rolling out Copilot for Legal, a set of AI tools built for legal work inside Microsoft 365. For many law firms, it's the first AI tool that works directly where lawyers already spend their day: in Word, Outlook and the firm's files.

It's a genuinely useful tool. It also makes some long-standing housekeeping more important than it used to be.

What It Does

In Word, Copilot for Legal can help review and analyze documents, draft and revise text, and suggest redlines directly in the document. Across a set of files, it can carry out multi-step work, such as pulling obligations and deadlines out of contracts, comparing agreements, or building a chronology of events.

Used well, it can take a lot of the first-pass work off a lawyer's plate.

Copilot Can See What the User Can See

This is the key point to understand. Copilot works with whatever documents, emails and files each user already has access to. That's how it's able to help.

The catch is that access in many firms has grown messy over the years. Folders shared with “everyone,” files left open after a matter closed, access never removed when someone changed roles. Before Copilot, those files were hard to stumble on. With Copilot, they're a question away.

Lawyers Remain Responsible

AI-generated work still needs review. Copilot can misread a clause, miss context or state something confidently that isn't right. The lawyer's professional obligations don't change because a tool produced the first draft. Firms should be clear about how AI-assisted work is checked before it goes to a client or a court.

Watch the Costs

Microsoft is also changing how Copilot is licensed and billed. Some features are billed by usage rather than a flat monthly fee. Without limits in place, costs can be harder to predict.

Before You Turn It On

• 1.Review permissions. Find files and sites that are shared too broadly and tighten them.
• 2.Check matter security. Make sure ethical walls and restricted matters are enforced in Microsoft 365, not just in your document management system.
• 3.Label sensitive content. Sensitivity labels can keep Copilot away from specific documents or matter types.
• 4.Start with a pilot. Choose a small group of lawyers and staff, test real workflows, and learn before rolling out firm-wide.
• 5.Train your people. Show users what Copilot does well, where it struggles, and how to check its work.
• 6.Set cost controls. Decide spending limits and who can use usage-based features.
• 7.Write it down. A short AI policy should cover approved tools, client confidentiality, and how AI-assisted work is reviewed.