Copilot Cowork: What It Does and Why It Matters
Howdang Rashid
Saturday, 22 August 2026 · 3 min read
Copilot has always had one massive advantage: it sits inside the Microsoft ecosystem. That's exactly why Cowork has generated so much hype. This isn't the Copilot that summarises a meeting or drafts a paragraph you rewrite anyway - Cowork actually does the work, running in the background while you focus on what only you can do.
The full carousel is free in the Powercademy Success Kit.
What is Copilot Cowork?
Cowork is the execution layer inside Microsoft 365 Copilot. You describe what you need done; Cowork breaks it into steps, works through them across your M365 apps, and delivers the output. Think of handing a brief to someone on your team - except they have access to everything in your M365 environment and work in the background while you carry on with your day.
What can it actually do?
Thirteen built-in skills cover the core of an M365 workday: creating and editing Word, Excel, PowerPoint, and PDF files; full email handling (compose, reply, forward, send, attachments); scheduling and calendar management with natural language and Teams links; meeting intelligence and daily briefings; enterprise search across your organisation; stakeholder communications; deep research into detailed reports; and interactive adaptive cards.
The interaction is a simple loop: describe what you need (text, files, or voice) → Cowork plans and executes, streaming progress → steer as it goes (interrupt, pause, queue messages) → approve before anything sensitive happens, with a risk-level preview → review the output in the side panel, download it, or open it in OneDrive.
Can you extend it with your own skills?
Yes - and this is the real power. Drop a SKILL.md file into OneDrive under /Documents/Cowork/Skills/ and Cowork picks it up automatically at the start of every conversation, up to 20 custom skills. Think: a weekly status report that pulls from your emails and calendar; a client onboarding routine that creates the right documents, folders, and welcome emails every time; a meeting-prep skill that searches your files and builds a briefing pack.
What powers it - and what are the limits?
Two things under the hood: Work IQ, sitting on top of Microsoft Graph, understands who you work with, your communication patterns, and your org structure. And Anthropic - Cowork is powered by Claude as a Microsoft subprocessor. Microsoft chose the best tech for the task, and for this they chose Anthropic.
Current limits worth knowing: it's Microsoft-365-only (no Salesforce or HubSpot), OneDrive/SharePoint files only (nothing local), browser and desktop app only for now, and your admin must enable both the programme access and the Anthropic subprocessor before you'll see it.
FAQ
How do I get access to Cowork?
Four steps: an active M365 Copilot licence, programme enrolment via the M365 admin centre, Anthropic enabled as a subprocessor in your tenant, then open m365.cloud.microsoft and select Cowork (or find it under All Agents).
What stops Cowork doing something I didn't want?
Every sensitive action pauses for your approval, with a risk-level indicator for medium and high-risk actions. You approve, cancel, or skip future prompts for similar actions in that conversation - you stay the director.
Is my data going to Anthropic?
Claude runs as a Microsoft subprocessor inside Microsoft's enterprise data protection framework - the same compliance boundary as the rest of M365 Copilot, with admin control over whether it's enabled at all.
How is this different from a Copilot Studio agent?
Cowork is your personal delegate across your own M365 workday. Copilot Studio agents are built capabilities you publish for other people, with their own knowledge and governance. Personal execution versus shared product.
The full carousel is in the Powercademy Success Kit - free, along with hundreds of other cheat sheets, roadmaps, and guides for Microsoft professionals.