Copilot Chat now sits inside Outlook rather than beside it, and that single change is what makes it useful. Instead of copying an email thread into a separate window, you ask a question about the message you already have open. Here is what actually works today, what it saves in a normal working day, and where the licensed version pulls ahead of the free Copilot Chat pane.
Summarize a long thread before you read it
The highest-value use is also the simplest. Open a thread with fifteen replies, open the Copilot pane and ask for a summary that lists the decisions made, the open questions and anything addressed to you specifically. You get a briefing in seconds instead of scrolling from the bottom up trying to reconstruct the argument.
Ask for the output shape you want. "Summarize this thread in five bullets, then list every commitment with the person who made it" produces a far more usable answer than "summarize this".
Draft replies that sound like you
Copilot drafts from the thread context, so you rarely need to explain the background. Give it the intent and the tone: "Reply declining the meeting, offer Thursday afternoon instead, keep it warm and brief."
Treat the first draft as a starting point. Use the refine options — shorter, more direct, more formal — rather than rewriting from scratch. Two refinement passes are usually faster than typing the message yourself.
Catch up on what you missed
After a few days away, ask Copilot to summarize what changed in your inbox: which threads moved, what needs a decision from you and what has already been resolved by someone else. This is the feature that turns a two-hour Monday backlog into a twenty-minute triage.
Pull commitments out of email
Email is where tasks go to hide. Ask Copilot to extract every action item from a thread with owners and dates, then move the ones that belong to you into To Do or Planner. Doing this at the end of each triage block is the habit that prevents the "I never saw that request" conversation.
Free Copilot Chat versus the licensed experience
- Free Copilot Chat: excellent for general drafting, rewriting, brainstorming and explaining concepts. It does not reach into your mailbox, calendar or files.
- Licensed Microsoft 365 Copilot in Outlook: grounded in your tenant data — it reads the open thread, your calendar and related documents, which is what makes summaries and catch-up possible.
- Practical rule: if the question needs your organisation's content to answer, it needs the licensed version. If it only needs language skill, the free pane is enough.
Prompts worth saving
- "Summarize this thread. List decisions, open questions and anything assigned to me."
- "Draft a reply agreeing to the scope but asking for two more weeks. Professional, three sentences."
- "What in my inbox from the last five days still needs a response from me?"
- "Extract all action items from this thread as a table with owner and due date."
None of this replaces judgement — you still decide what to send. But the reading, sorting and first-draft work that fills an inbox day is exactly what Copilot Chat in Outlook removes, and most people feel the difference within a week.