Microsoft 365 Copilot Review 2026: The AI Assistant That Promises to Transform How You Work

# Microsoft 365 Copilot Review 2026: The AI Assistant That Promises to Transform How You Work

Published on Digital by Default | October 2026

Microsoft has made the biggest bet in enterprise AI. Over a billion people use Microsoft 365, and Microsoft is now asking every organisation to pay an additional £24/user/month to add an AI layer across Word, Excel, PowerPoint, Outlook, and Teams. At that price, for a 100-person company, you are looking at an extra £28,800/year. The question every business leader is asking is simple: is it worth it?

After extensive deployment across multiple organisations, our answer is: it depends on what you do, and it depends on how much of your work lives inside Microsoft 365. For some roles, Copilot is genuinely transformative. For others, it is an expensive novelty. Understanding the difference before you commit is critical.

What Microsoft 365 Copilot Actually Is

Microsoft 365 Copilot is an AI assistant embedded directly into Microsoft's productivity applications. It uses large language models (built on OpenAI's GPT technology) grounded in your organisation's Microsoft 365 data — your emails, documents, presentations, spreadsheets, Teams messages, and SharePoint content.

This "enterprise data grounding" is the key differentiator. Unlike ChatGPT, which knows nothing about your business, Copilot can reference your actual documents, emails, and meetings. Ask it to "summarise the key decisions from last week's project review meeting" and it pulls from your Teams meeting transcripts. Ask it to "draft a proposal based on the client brief in my email" and it references the actual email.

The AI processes data within your Microsoft 365 security boundary. Your data does not leave your tenant, is not used to train models, and is subject to your existing access controls. For enterprise compliance, this matters enormously.

Key Features That Actually Matter

Copilot in Word

You can prompt Copilot to draft documents from scratch, summarise long documents, rewrite sections in a different tone, generate content based on other documents in your organisation, and transform rough notes into polished prose.

The drafting quality is good for first drafts — reports, proposals, briefs, and summaries. It is poor for anything requiring creative originality, technical precision, or nuanced argumentation. Think of it as a competent junior writer who needs editing, not a senior author who delivers finished work.

Where it genuinely excels is in reference-based drafting. "Write a project update based on the latest status reports in the Project Alpha SharePoint site" produces usable output in seconds that would take 30 minutes manually.

Copilot in Excel

Copilot in Excel allows natural language data analysis. You can ask "What were the top 5 products by revenue last quarter?" or "Create a pivot table showing sales by region and month" and Copilot generates the analysis. It can create formulas, build charts, identify trends, and highlight outliers.

This is where Copilot's value is most role-dependent. For finance teams, analysts, and operations managers who spend hours in spreadsheets, it is genuinely useful. For teams that barely use Excel, it adds nothing.

The limitation is that Copilot works best with well-structured data. Messy spreadsheets with inconsistent formatting, merged cells, and missing headers produce poor results.

Copilot in PowerPoint

Copilot can generate presentations from outlines, Word documents, or other PowerPoints. It handles slide layouts, content generation, image suggestions, and speaker notes. You can also ask it to summarise, restructure, or redesign existing presentations.

The output is functional but generic. It will not produce the kind of polished, brand-aligned presentations that a skilled designer creates. It is most useful for internal presentations where speed matters more than aesthetics — status updates, team meetings, and working sessions.

Copilot in Outlook

Email drafting, summarisation, and management. Copilot can draft replies, summarise long email threads, extract action items, and prioritise your inbox. The email drafting is solid — it matches your writing style over time and produces appropriate responses for most routine emails.

The thread summarisation is arguably Copilot's single most valuable feature across any application. Long email chains with 15 participants and 30 replies are summarised into key points, decisions, and outstanding questions in seconds.

Copilot in Teams

Meeting summaries, transcript search, and real-time assistance during meetings. After a Teams meeting with transcription enabled, Copilot generates summaries with key decisions, action items, and follow-ups attributed to specific participants.

You can also query meeting transcripts: "What did Sarah say about the budget?" or "List all action items assigned to me across this week's meetings." For managers attending multiple meetings daily, this is one of Copilot's strongest features.

Enterprise Data Grounding

The thread that connects everything. Copilot's access to your organisation's Microsoft Graph data — documents, emails, calendar, Teams messages, SharePoint content — means it can answer questions that span multiple data sources. "What is the status of the Henderson project?" might pull from a SharePoint status report, a recent Teams meeting, and an email thread, synthesising a coherent answer.

This only works well if your organisation's data is well-organised within Microsoft 365. If critical information lives in external systems, Copilot cannot access it.

Comparison: Microsoft 365 Copilot vs Google Workspace Gemini vs Notion AI vs ChatGPT

Pricing

Watch out for: The £24/user/month price is on top of your existing Microsoft 365 licence. For an organisation on Microsoft 365 E3 (approximately £28/user/month), adding Copilot increases your per-user cost by 86%. There is no free tier and no trial long enough for meaningful evaluation.

Microsoft requires annual commitments for enterprise Copilot licences. You cannot easily test with a few users for a month and scale up — you are committing to a year of spend.

Who It's For

• Knowledge workers in Microsoft-heavy organisations who spend significant time in Word, Excel, Outlook, and Teams
• Executives and managers who attend multiple meetings daily and need AI-powered summaries and action item tracking
• Finance and analytics teams that work extensively in Excel and need natural language data analysis
• Sales teams that draft proposals, summarise client communications, and prepare presentations frequently
• Organisations with well-structured Microsoft 365 data — clean SharePoint sites, organised Teams channels, and consistent document management

Who It's Not For

• Organisations not using Microsoft 365 — the value is entirely dependent on the Microsoft ecosystem
• Small teams where the £24/user/month premium represents a significant cost relative to productivity gains
• Creative professionals — Copilot produces functional, not creative, output
• Organisations with poor data hygiene — if your SharePoint is a mess and your Teams channels are unorganised, Copilot will reflect that chaos
• Technical teams that primarily use specialised development tools rather than Microsoft Office applications

How to Get Started

1. Audit your Microsoft 365 usage first. Before purchasing Copilot, understand which applications your team actually uses daily. If your organisation primarily uses Gmail and Google Docs but has Microsoft 365 licences gathering dust, Copilot will not change that.

2. Start with a pilot group of 10-20 heavy Microsoft 365 users. Choose people who live in Outlook, Word, and Teams. Measure their experience over 30 days before rolling out broadly.

3. Clean up your data first. Copilot is only as good as the data it can access. Organise your SharePoint sites, ensure Teams channels have clear purposes, and archive outdated content before enabling Copilot.

4. Train users on effective prompting. The difference between a vague prompt ("write me a report") and a specific one ("summarise the Q3 sales figures from the regional reports in the Sales SharePoint site, focusing on underperforming regions") is the difference between useless and valuable output.

5. Measure ROI specifically. Track time saved on specific tasks: meeting summarisation, email drafting, document creation, data analysis. If you cannot demonstrate 30+ minutes saved per user per day, the £24/user/month is hard to justify.

The Verdict

Microsoft 365 Copilot in 2026 is genuinely useful for specific roles in Microsoft-heavy organisations. Meeting summaries in Teams, email thread summarisation in Outlook, and reference-based drafting in Word are the features that deliver the most consistent value. Excel's natural language analysis is impressive when data is clean.

The challenge is the price. At £24/user/month with an annual commitment, the total cost is substantial and the ROI is uneven. Some users will save an hour a day. Others will use it twice and forget it exists.

Our recommendation: deploy Copilot selectively. Identify the roles and teams where it will deliver the most value — typically executives, managers, analysts, and sales teams — and measure the impact before expanding. Blanket deployment across an entire organisation is almost certainly a waste of money.

Considering Microsoft 365 Copilot for your organisation? [Talk to us](/contact) — we help businesses evaluate, deploy, and optimise AI productivity tools for maximum ROI.