I see a lot of people trying out Microsoft 365 Copilot for Outlook, then asking why the emails it drafts don’t sound like them. Many end up manually tweaking every email Copilot writes, thinking it’s unavoidable.

“Why does Copilot always add ‘I hope you’re well’? I’m spending more time editing than drafting!”

Sound familiar? That’s not a failure of Copilot. That’s a missed opportunity. If you keep re-teaching Copilot your style every time you use it, you’re doing it wrong. The solution: set up the right instructions once, so Copilot learns how you want your emails written from the start.

What are Outlook Draft Instructions and Copilot Personalization, really?

Think of them as layers of guidance for Copilot. Outlook Draft Instructions are your email-specific preferences stored in Outlook. They’re all about how your email drafts should look: friendly vs formal tone, how long or detailed to make messages, whether to use bullet points, how to greet people, the sign-off you prefer—basically, how to sound like you in email (https://support.microsoft.com/outlook/copilot-outlook/ask-copilot-to-make-email-drafts-sound-like-you).

By contrast, Microsoft 365 Copilot Personalization is your global Copilot profile—the custom instructions and memory that apply across all Copilot experiences in Microsoft 365 (Word, Outlook, Teams, etc.), not just email. These personalization settings let Copilot know your role, typical audience, and general communication style so it can tailor any response, in any app, closer to what you need (Customize how Microsoft 365 Copilot responds to you).

Put simply: Draft Instructions tell Copilot how to handle your emails, while Copilot Personalization defines how Copilot behaves everywhere. And there’s no mystery about which one takes priority. When you click Draft with Copilot in Outlook, here’s the order in which Copilot follows your instructions:

• Your prompt (highest priority): Anything you explicitly ask for (tone, style, language, etc.) in the prompt overrides everything else.
  

• Outlook Draft Instructions: Your app-specific email defaults; used whenever your prompt doesn’t override them.
  

• Global Copilot Personalization: Your general preferences fill any gaps not covered by your prompt or Outlook’s instructions.
  

• Organizational policies: These always apply for compliance and safety (e.g. Data Loss Prevention (DLP) blocking sensitive info) but they don’t affect writing style.

Step-by-Step: Fine-tune Copilot for your email style

Open Outlook’s Copilot Draft Instructions

To set this up, you’ll need the new Outlook (or Outlook on the web) since the feature isn’t in classic Outlook’s UI. In the new Outlook on Windows or web, click the Copilot icon in the compose window. From the dropdown, select Settings, then click Draft Instructions.

Add your email style preferences

Turn on Use custom instructions when drafting email. Now type a short description of how you want Copilot to draft your emails. Be specific about tone, structure, greetings, and sign-offs. Do you prefer concise messages or detailed ones? Formal language or a friendly vibe? For example, you might write:

Use a friendly tone.
Start each email with "Hi [Name],".
Avoid corporate jargon and fluff.
Sign off with "Thanks, [Your Name]".

Notice what’s missing? We didn’t mention anything about length or level of detail in those instructions. That’s on purpose – if you leave something out here, Copilot will fall back to your global Personalization settings to fill in the blanks.

Set global Copilot Personalization

Next, open your Microsoft 365 Copilot settings (for example, in the Copilot Chat app or via the Copilot sidebar in any Office app). Go to Settings and select Personalization. Under Custom instructions, add broad guidance about yourself and your style that should apply everywhere. Tell it who you are and how you like your output across Microsoft 365. For instance, “I’m a small business owner writing for busy clients, so keep everything concise and professional.” Save your instructions.

Why this changes how you email

Once you’ve set up these preferences, you’ll stop fighting with Copilot’s tone and phrasing. Instead of manually fixing greetings or trimming fluff each time, you get drafts that fit your style on the first try. It’s like hiring an assistant who already knows your voice—from day one.

Better yet, showing your clients how to configure these settings is an easy win. It reduces their frustration with generic AI output, boosts their trust in Copilot, and makes you look like a trusted advisor. If you’re not helping them set their Copilot’s style, you’re leaving a lot of value on the table.

Copilot’s drafting preferences aren’t about adding complexity – they’re there to remove it.

Set them up once, and you can stop rewriting Copilot’s emails and start reaping the benefits of an AI that truly sounds like you.

Last Friday I sat down with my Outlook calendar open for the week ahead and felt that familiar drop in the stomach. Eighteen meetings. Two thirty-minute “quick syncs” stacked back to back. A coaching session I’d promised myself I’d run for a client. A “catch-up” with someone whose name I had to look up twice. And the actual deep work — the strategy piece I’d been telling everyone was my top priority for the quarter — nowhere to be seen.

That’s the moment it clicked properly. My calendar wasn’t a plan. It was a confession.

What the diary is really telling you

A diary is a record of where your attention actually goes, not where you wish it went. If the most important work of your year isn’t on it — blocked out, named, defended — then you haven’t really committed to it yet. You’ve just talked about it.

A lot of us treat our calendar like an inbox. Things land in it. People send invites, we accept, and the week fills up by default rather than by design. Then we wonder why the work that actually moves the business forward keeps slipping into Saturday morning.

There’s a simple test I run now. Open Outlook on a Sunday night. Look at the week ahead. Can you point to the block that represents the one thing you said matters most this quarter? If not, the rest of the week is just noise around an empty centre. And the empty centre is the bit you said mattered.

Run a weekly audit, not a weekly hope

Hope isn’t a strategy, and a calendar that fills itself isn’t one either. So I now sit down every Friday afternoon for fifteen minutes and review what I actually did against what I said I would do. Copilot in Outlook makes this surprisingly easy — I ask it to summarise where my time went, who I spent it with, and which blocks moved against my stated priorities. The answer is often uncomfortable.

Then I look at the week ahead and run every single block past one question. Is this taking me closer to the work I said matters, or further from it? If the honest answer is “further”, the meeting goes. I decline it, suggest an async update in Teams, or send a Loop component with the three things I would have said in the room. Nobody has yet complained that they got a clearer written summary instead of a half-attended meeting.

The ones that pass the test get something more important than a tick. They get protected. Title in bold, marked as busy, no overlay. I treat them with the same seriousness I’d give a paying client, because future me is the client.

The feedback loop most leaders skip

Here’s the bit that surprised me. Once I started running this rhythm, my calendar stopped being a source of guilt and started being a source of useful signal. It tells me, week by week, whether I’m actually serious about what I said matters. Or whether I’ve quietly traded it for the comfort of being responsive.

That’s the real value of reading the week before you live it. Mid-game, a scoreline tells you what to do next — push harder, change tactics, stop bleeding time on the wrong play. The diary does the same job, if you’ll let it. It doesn’t argue with you. It just shows you the score.

Copilot can draft the polite decline. Teams can absorb the conversation that didn’t need a meeting. Outlook can hold the block you’ve been avoiding. But none of that matters until you decide, every single week, what’s on the board and what’s just filler.