What changed

As of July 2026, Claude's Microsoft 365 connector gained write tools. Previously it could read your Outlook email and calendar to answer questions. Now it can act: draft and send emails, create and manage calendar events, and create or update files in OneDrive and SharePoint. That's a real jump in what it can do for you, and a good moment to be deliberate about how much you let it act on its own.

The genuinely useful jobs

Where this shines is the routine admin that eats your morning. Ask Claude to draft replies to a batch of straightforward emails and leave them in your drafts for review. Have it find a meeting time that works across a few calendars and set it up. Get it to pull the details from a thread and create a file summarising the outcome. These are jobs with a clear right answer and low stakes if you catch a mistake before it goes out.

Start read-only, then earn the write access

The safe way to adopt this is in stages. For the first week, keep Claude drafting into your drafts folder rather than sending, and proposing calendar changes rather than making them. Read what it produces. Once you've seen it get the same kind of task right several times, you can let it send the low-risk ones directly. You're not being paranoid; you're building a track record before you hand over the keys.

Draft replies to the unread emails in my inbox from the last two days. Rules: - Save every reply as a draft. Do NOT send anything. - Match the tone of the original sender. - For anything involving money, a commitment, or a complaint, don't draft a reply — just flag it for me to handle. - Give me a one-line summary of what each draft says.
💡 The rule for sending

Let Claude send only the emails where a small mistake is easily fixed — a meeting confirmation, a "got it, thanks", a routine acknowledgement. Anything that makes a commitment, quotes a price, touches a dispute, or goes to someone senior or external: draft only, and you press send. The convenience isn't worth an email you can't take back.

Watch what it can reach

A tool that can send email as you and change your calendar has real reach, so treat the connection itself with care. Only connect the account you actually need it working in, review what permissions you've granted, and be cautious about letting it act on emails from people you don't know — a message asking it to do something is still just an email, and it shouldn't be trusted more because Claude read it. When in doubt, keep it drafting, not sending.

Do this today

If you use Claude with Microsoft 365, run the draft-only prompt above on your inbox and read what it produces — without letting it send. You'll get a feel for how good the drafts are and exactly which types of email you'd trust it to send later. That first cautious run is how you get the time-saving without the risk.