Microsoft’s bet is simple: the best place for AI is inside the software where work already happens, and for most UK service firms that software is Microsoft 365. Copilot is that bet productised: an assistant in Outlook, Word, Excel, PowerPoint and Teams that can read your mail, your files and your meetings, because it sits inside the tenant that already holds them. Pew’s February 2026 survey put Copilot third among US adults at 17%, but consumer share understates it: its natural habitat is the workplace.

What you are buying

  • Copilot Chat with a work account: a general assistant with commercial data protection, included with Microsoft 365 business plans. A reasonable free baseline, and a reason staff need not drift to personal accounts elsewhere.
  • Microsoft 365 Copilot, the paid per-seat add-on: the version embedded in the Office apps and grounded, through Microsoft Graph, in your organisation’s own content. Draft this reply from the thread, summarise what I missed in Teams, first version of this document from these notes, what changed in this Sheet. This is the product people mean when they say Copilot changed their week.
  • Copilot Studio and Power Automate: Microsoft’s low-code route to custom assistants and automated workflows on the same platform. Genuinely useful for contained internal cases; the same honest limits apply to it as to all low-code once workflows get complex.
  • Azure OpenAI and Azure AI Foundry: for custom builds, Microsoft sells frontier models inside Azure’s compliance envelope, which is often the smoothest procurement path for firms whose IT policies already trust Azure.

What it does well

Copilot’s wins are proximity wins, and in a Microsoft firm they are everywhere:

  • Outlook. Mail triage, thread summaries and drafted replies where most service-firm hours already go.
  • Teams. Meeting recap, actions and the answer to “what did I miss”, grounded in the meetings you were actually in.
  • Word and Excel. First drafts from your notes; sense made of a spreadsheet without remembering formula syntax.
  • Grounding in your own content. The differentiator: answers drawn from your files and mail via Microsoft Graph, with links back to sources, not just the model’s general knowledge.

Two limits are worth naming. Writing quality at the demanding end, the long judgement-heavy client documents, is where specialist tools like Claude tend to pull ahead; test with your own documents before assuming either way. And Copilot works best inside its suite: processes that span your CRM, your back office and the outside world usually need proper automation or a custom build around it.

The permissions caveat

Copilot can retrieve anything the signed-in user already has permission to see. In firms where sharing settings have drifted for years, that means the HR folder someone was accidentally given, or the fee model shared to “everyone”, becomes one question away. Nothing about this is a Copilot data leak: it is your existing permissions, made searchable. Review sharing on sensitive libraries BEFORE switch-on, not after the awkward discovery. ::: Alongside that, the usual paperwork applies and is comparatively easy here, since processing sits under your existing Microsoft 365 data protection terms; the UK governance guide covers the DPIA and accountability side.

The pilot that answers the cost question

Blanket-licensing everyone is how Copilot disappoints; a one-month pilot is how it proves itself. The shape:

  1. Pick five heavy users of email, documents and meetings, not five enthusiasts.
  2. List each person’s ten most repetitive weekly tasks before switch-on.
  3. Run the month, then score each task: faster, unchanged, or newly possible.
  4. License the roles the evidence supports; skip the rest without apology.

An hour or two saved per seat per month usually clears the licence cost; the pilot tells you which seats actually get it.

Where I fit in

Copilot rollouts fail quietly: licences bought, permissions unexamined, staff untrained, savings unmeasured. I do the unglamorous parts: the permissions review before switch-on, the pilot that proves value per seat, the training that builds habits, and the automation work for the processes Copilot cannot reach on its own. An Automation Audit tells you which of those your firm needs first.