Microsoft Copilot is an AI assistant embedded in Microsoft 365 apps. In practice it summarises long email threads and drafts replies in Outlook, drafts and rewrites documents in Word, analyses data and writes formulas in Excel, recaps meetings with action items in Teams, and produces first-draft decks in PowerPoint. Microsoft 365 Copilot is licensed per user per month on top of a Microsoft 365 subscription. What it does not do is run multi-step business workflows across systems - it assists the person inside the document they have open.
What is Microsoft Copilot?
Two products share the name. Free Copilot is a chatbot, like ChatGPT with a Microsoft skin. Microsoft 365 Copilot is the paid per-seat version embedded in Office apps, able to draw on your own emails, documents and meetings through Microsoft Graph. The paid tier is the one businesses mean, priced at roughly A$45 per user per month at the time of writing.
The difference between the tiers is access to your data. Free Copilot answers from the model and the web. Microsoft 365 Copilot can answer from your tenant: summarise what your team said about a client across email and Teams, draft a document in your firm's existing style, or build a deck from a report you wrote last month.
It inherits Microsoft 365's permissions - Copilot can only surface content the signed-in user can already open. That makes tenant hygiene matter: loosely shared folders become loosely shared answers.
What Copilot does in each app
Outlook: thread summaries and drafted replies. Word: first drafts and rewrites from a prompt or a reference document. Excel: natural-language analysis, formula suggestions and charts. Teams: live meeting recaps with decisions and action items. PowerPoint: first-draft decks from a document or outline.
- Outlook - summarise a 30-message thread in seconds, draft a reply in a chosen tone, pull out commitments and dates.
- Word - produce a structured first draft from a brief, rewrite for tone or length, summarise a long document before a meeting.
- Excel - ask plain-language questions of a table, generate formulas, highlight trends. Strongest on clean tabular data.
- Teams - recap meetings with who-said-what, decisions and actions; catch up on a meeting you missed without watching the recording.
- PowerPoint - turn a Word document into a starting deck, restyle slides, condense content.
The honest framing: Copilot compresses the first 60-80% of a drafting task. The last stretch - judgement, accuracy checking, client-readiness - stays with the person, which is exactly where it should stay.
What Copilot does not do
Copilot does not run processes. It will not watch an inbox and chase missing documents, write back into Xero, MYOB, LEAP or PropertyMe, route work by rules, or hold an output for approval before it goes to a client. It assists whoever has the document open; nothing happens when nobody is driving.
This is a design boundary, not a flaw. Copilot is personal productivity software: one person, one app, one task, made faster. A business workflow - enquiry to booked appointment, job to paid invoice, document collection for BAS - crosses systems, runs on a trigger rather than a person, and needs approval gates and an audit trail.
Microsoft's own answer to that gap is Copilot Studio, a platform for building custom agents. It is a genuine build tool, which is the point: by the time you are designing triggers, integrations and approval logic in Copilot Studio, you are doing custom workflow implementation - the same discipline as any other build, with the same scoping questions.
Copilot or a custom AI workflow?
Not a versus - they cover different layers. Copilot makes individuals faster inside Office and is worth licensing for heavy email-and-documents roles. A custom workflow automates a repeating business process end to end, inside the systems it actually touches, with human approval where it matters. Most firms that get value from one eventually run both.
The decision pattern we see work: license Copilot for the people who live in Outlook and Word, and scope a custom build for the one process that eats the most team hours - usually intake, follow-up, document chasing or reporting. The two do not compete for the same job, and the cost shapes differ: per seat forever versus a <a href="../services/ai-automation-services">scoped build</a> you own.
Where the stack is Microsoft-heavy, a custom workflow can sit alongside Copilot comfortably - reading the same mailboxes and SharePoint libraries through the same permission model, which is how we approach <a href="../software/microsoft-365-ai-automation">AI automation inside Microsoft 365</a>.