What it does

Copilot in Outlook drafts and rewrites emails, summarises long threads, suggests replies, and can coach your tone before you send. It also surfaces scheduling and follow-up help.

Key facts

• Summarise collapses a long thread into the key points with links back to the messages.
• Draft and Coaching work on the compose window — tone, clarity, length.
• Some Copilot features are tied to the new Outlook and Outlook on the web; classic Outlook lags.
• It reads only mail the user can already access — no extra reach into other mailboxes.

When to use / skip

Excellent for taming a 40-message thread you've been added to late, and for softening or tightening a draft. Skip the auto-draft for short, routine replies — you'll type them faster than you'll prompt them.

Configuration decisions

• Which Outlook client your users are on, and whether that supports the features you're promising.
• Whether Coaching and drafting are surfaced or held back during early rollout.

Gotchas

• The classic-vs-new Outlook split is the number-one support headache. People on classic don't see what the training showed.
• Thread summaries can miss nuance in a heated exchange — read the actual mail before you act on a summary.
• Drafted replies can be over-long and over-polite for internal comms.

Consultant notes

• Pin down client versions before you train anyone. "It's not there" is nearly always a client issue, not a licensing one.
• Thread summarisation is the sleeper hit — it's the feature people keep once the novelty of drafting wears off.
• Tone coaching lands well with people who write a lot of external mail; less so with engineers firing off one-liners.

---

Worth revisiting after the next release wave.