Every developer has watched a non-technical colleague get surprisingly good results from Copilot — and wondered what's actually happening under the hood, and why it sometimes confidently gets things wrong. This book answers both questions, and then goes further: it teaches you to build on top of the system, not just use it. Written for developers and engineers rather than end users, Microsoft Copilot AI opens the hood on the orchestrator, the foundation model, and the Microsoft Graph grounding layer that together decide what Copilot can see and say. From there it moves fast into the territory most Copilot books never reach: writing prompts that retrieve the right context instead of guessing, building Microsoft Graph connectors that ground Copilot in your own systems without quietly leaking data across permission boundaries, and choosing the right extensibility tier — declarative agent, Copilot Studio, or the full Microsoft 365 Agents SDK — for the agent you actually need to ship. The back half treats Copilot the way you'd treat any other piece of production infrastructure: governance and oversharing risk, Microsoft Purview and licensing realities, identity and the Agent 365 control plane, and the testing, monitoring, and rollout discipline that separates a demo from something a hundred colleagues can depend on. Every chapter is built around real-world case studies, worked examples, and hands-on exercises, so the concepts land as engineering practice, not theory. By the last page, you won't just know how to use Copilot well. You'll know how to extend it, ground it in your organization's real data, secure it, and ship it — with the same rigor you'd bring to any other production system. What's inside: Copilot's three-layer architecture and how grounding actually works · prompt engineering as an engineering discipline · Microsoft Graph connectors and permission mapping · declarative agents, Copilot Studio, and the Microsoft 365 Agents SDK · governance, Purview, and oversharing risk · testing, monitoring, and production rollout strategy · a full bonus kit of prompt templates, checklists, and a 30-day adoption plan.
