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The Security Shield
Quick Response Times
Most of Copilot is reactive – you ask, it answers. Copilot Cowork flips that on its head. Instead of waiting for the next prompt, you describe an outcome you want, and Cowork builds a plan, works through the steps across your Microsoft 365 apps, and checks in with you before taking action that affects anyone else.
Here’s what a good one covers.
Microsoft launched it in the Frontier preview back in March 2026, and it hit general availability worldwide on June 16, 2026.
A few real things Cowork can do:
It’s powered by Anthropic’s Claude models (Opus 4.8 and Sonnet 4.6) plus GPT 5.5, all running inside your secure Microsoft 365 tenant. Billing is usage-based through Copilot Credits, so admins can set per-user or per-group caps to prevent surprise bills.
Cowork is where Copilot stops being an assistant and starts being a teammate.
The takeaway. Ninety days from chaos to controlled rollout. Skip steps and you’ll feel it later. Follow the timeline and AI actually sticks.
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