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The Challenge

Every IT leader I speak to has the same frustration with Copilot: it's good at drafts but terrible at follow-through. Ask it to summarise a meeting and you'll get a decent summary. Ask it to then reschedule three conflicts, prepare the briefing deck, pull the latest numbers from Excel, and email the team — and you're back to doing it yourself.

That gap between "here's a draft" and "the work is done" is where most AI productivity tools stall. They generate artefacts. They don't complete workflows. And the difference matters because nobody's job is to produce a single document in isolation. Work is messy, multi-step, and spread across a dozen apps.

Microsoft knows this is the Copilot adoption ceiling. Seats grew 160% year-over-year and daily active usage is up ten times, but the ROI conversation still centres on "it writes emails faster." That's a hard story to tell at $30 per user per month.

What's Changed

Yesterday's Wave 3 announcement is Microsoft's most ambitious Copilot update since launch, and at its centre is Copilot Cowork — built in close collaboration with Anthropic.

Cowork is not a chat feature. It's a background execution engine. You describe the outcome you want, and Cowork breaks it into a multi-step plan that runs across Microsoft 365 apps — Outlook, Teams, Excel, Word, PowerPoint, SharePoint — coordinating actions and producing outputs over minutes or hours.

The key difference from what you've seen before: Cowork doesn't stop after generating one thing. It orchestrates. Reschedule meetings, build the prep deck from your recent emails and files, draft the customer update, attach the latest analysis, and send it — all from a single request. You get checkpoints throughout so you can steer, pause, or approve before anything ships.

Under the hood, this runs on Anthropic's agentic technology — the same foundation as Claude Cowork — integrated into Microsoft 365's security and governance framework. But Microsoft is explicit that Copilot is "multi-model by design." Claude handles the long-running reasoning. OpenAI's latest models (including GPT-5.4) handle other tasks. The system picks the right model for each step without you thinking about it.

What actually shipped

Let's be specific about what Wave 3 includes beyond Cowork:

Agentic Copilot in Word, Excel, PowerPoint, and Outlook: Copilot now works alongside you inside documents — editing, refining, and building on existing work rather than generating from scratch. Excel and Word are GA; PowerPoint and Outlook rolling out over coming months.
Claude in mainline chat: Available now through the Frontier programme. Not a separate tool — it's embedded in your regular Copilot conversations.
Agent 365: The control plane for AI agents across your organisation. One place to observe, govern, and secure every agent. GA on 1 May at $15/user/month.
Microsoft 365 E7 — "The Frontier Suite": A new licensing tier at $99/user/month that bundles E5 + Copilot + Agent 365 + Entra Suite + advanced Defender, Intune, and Purview capabilities.

The E7 pricing reality

This is the part that deserves a direct look. Microsoft is consolidating its AI licensing into a single SKU at $99/user/month. If you're already on E5 ($57) plus Copilot ($30), you're at $87. Add Agent 365 ($15) and you're at $102. So E7 is a slight discount for organisations going all-in — but it's also a clear signal that Microsoft expects AI agent management to be as standard as identity and security management.

For IT leaders still running proof-of-concept pilots, this pricing model creates pressure to make a commitment decision. Microsoft is packaging AI as table stakes, not an optional add-on.

Getting Started

Cowork is in research preview now with a limited set of customers, and will be available through the Frontier programme in late March 2026. If your organisation isn't already enrolled, that's the first step.

For Wave 3 features that are GA today:

Agentic Copilot in Word and Excel is rolling out now. Test it by opening an existing document and asking Copilot to refine, restructure, or extend it — not just generate from scratch.
Claude in Copilot chat is available through the Frontier programme. Try it on complex reasoning tasks and compare against the default model.
Agent 365 preview is available now — register to get visibility into agents already operating across your tenant before the May GA date.

One practical recommendation: start documenting the multi-step workflows your team currently stitches together manually. Meeting prep, client research, launch coordination, weekly reporting — these are your Cowork candidates. Having a list ready means you can run meaningful tests the moment you get access, rather than defaulting to "write me an email."

What This Means

Microsoft is making two big bets with Wave 3. The first is that multi-model is the right architecture — no single model vendor wins every task, so Copilot should orchestrate the best of each. The Anthropic partnership for Cowork is the most visible proof of this, but it's a design principle that extends across the platform.

The second bet is that AI agent governance is a category, not a feature. Agent 365 as a separately priced control plane at $15/user signals that Microsoft sees agent sprawl as the next shadow IT problem. IDC projects 1.3 billion agents in circulation by 2028. If even a fraction of that materialises, organisations without a management layer are flying blind.

The honest caveat: Cowork is in research preview. The examples Microsoft shared — calendar triage, meeting prep, company research, launch planning — are compelling demonstrations, but production reliability across complex multi-app workflows remains to be proven at scale. Early access customers will be the real test.

Still, the direction is right. The productivity promise of AI was never "generates a draft 40% faster." It was "completes the work so you can focus on the decisions that matter." Cowork is the first credible attempt to deliver on that within the enterprise apps people actually use every day.