How Microsoft Copilot Finds the Billable Hours You Missed

Your Microsoft 365 already knows what you worked on today.

Your Outlook calendar has the client calls. OneDrive has the documents you drafted and edited. Your sent mail has the opposing counsel correspondence. The activity is all there - timestamped, organized by client, sitting in tools you already pay for.

The problem is none of it talks to your billing software.

So at the end of the day - or worse, at the end of the week - you reconstruct your hours from memory. And the research is clear on what happens next: attorneys who don’t track time the same day lose 50-70% of their billable hours. For a solo billing $250/hour, that’s $30,000 or more per year that simply vanishes.

It doesn’t have to work this way.

Watch: Copilot Recovering Nearly 2 Hours of Missed Time

In this 3-minute demo, I connect Microsoft Copilot to Writly’s practice management data and ask one question: “What did I work on today that I haven’t billed yet?”

Copilot pulls from three sources - Outlook calendar events, OneDrive file activity, and sent emails - and cross-references them against the time entries I’ve already logged. It found 1.9 hours of billable work I would have lost if I’d waited until the next morning to reconstruct my day.

The entries come back pre-filled: matter, description, duration. Review, edit if you want, submit. No re-typing. No toggling between your calendar and your billing software trying to remember what happened three days ago.

Why This Works (And Why Most Practice Management Software Can’t Do It)

The key isn’t AI. AI is just the interface. The key is the connection between your practice data and the AI tool you’re already using.

Most practice management platforms are walled gardens. Your data goes in, but it doesn’t come out - at least not in a way that other software can use. Clio, MyCase, PracticePanther - they keep your matters, contacts, and billing locked inside their own ecosystem. If they offer AI, it’s their AI, trained their way, priced as an add-on.

That means Copilot - the AI tool Microsoft already bundled with your Microsoft 365 subscription - can’t see your practice data. You’re paying for an AI assistant that doesn’t know you’re a lawyer.

Writly takes a different approach. We built an open connection layer - based on the MCP standard - that lets any AI tool plug into your practice data. Copilot, Claude, ChatGPT, whatever you prefer. Your data goes wherever you want to take it.

That’s how the demo above works. Copilot reads your Writly matters, contacts, and time entries through the open connection. Then it cross-references what it finds in your Microsoft 365 activity. The result: time entries you missed, ready to log.

The Math on Recovered Hours

Let’s say Copilot finds just one billable hour per day that you would have otherwise lost. At $250/hour, five days a week, that’s:

• $1,250/week
• $5,000/month
• $60,000/year

You don’t even need to recover a full hour. Half an hour a day - one client call you forgot to log, one email chain you didn’t bill for - is $30,000/year. That’s a transformative number for a solo practice.

Writly costs $27/month for Founding Firms. The tool pays for itself with a single recovered time entry per month. Everything after that is pure upside.

You Might Already Be Paying for Copilot

Here’s what a lot of solo attorneys don’t realize: if you upgraded to Microsoft 365 Business Premium or added Copilot to your plan, you’re already paying for this capability. You’re just not using it - because your practice management software won’t connect to it.

This is the pattern we see over and over. Firms pay for Copilot, get excited about AI, and then discover it can’t access the data that matters most: their matters, their client information, their billing history. So Copilot becomes a fancy spell-checker instead of a billing recovery tool.

Writly is what turns your Copilot on.

Get This Running at Your Firm

We’ll handle the Copilot set up at no extra cost for Founding Firms - $27/month total, locked in forever. We’ll walk you through the connection, make sure it’s working with your data, and get you recovering hours the same day.

Book a 15-minute setup call ->

What Else Can Copilot Do With Your Practice Data?

Time entry recovery is the most immediately valuable use case, but it’s not the only one. Once Copilot can see your matters, contacts, documents, and billing history, you can ask it to:

• Summarize a matter - “What’s happened on the Johnson estate in the last 30 days?”
• Draft a client update email - pulling from actual matter activity, not a generic template
• Flag overdue invoices - “Which clients haven’t paid in 60+ days?”
• Prepare for a meeting - “What do I need to know before my 2pm call with the Reid matter?”
• Generate an invoice - with accurate descriptions pulled from your logged time entries

The point isn’t that AI replaces your judgment. It’s that AI handles the back-office work that eats your day - the administrative tasks that don’t require a law degree but still consume hours of your time every week.

The Bigger Picture

The legal profession is going through an AI transition, and the firms that benefit most won’t be the ones with the fanciest AI features. They’ll be the ones whose AI can actually access their data.

That’s a connectivity problem, not an intelligence problem. And it’s the problem Writly was built to solve.

Your Microsoft 365 already knows what you worked on today. Your practice management software should make that knowledge useful.

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This post is part of the “AI in Practice” series, exploring how solo and small firm attorneys can use AI with their actual practice data. See also: Connecting AI to Your Practice Data and Stop Worrying About AI Writing Your Briefs.

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CTA: Writly connects your practice data to Microsoft Copilot, Claude, ChatGPT, and any AI tool that supports the MCP standard. $27/month for Founding Firms, locked in forever. Start your free trial ->