A Microsoft Build session walkthrough covering how to build multi-agent workflows using Microsoft Fabric, Azure AI Foundry, and the Microsoft 365 ecosystem. The presenter demonstrates connecting agents to Work IQ (email, calendar, Teams) via MCP servers, using Fabric data agents with ontology-based knowledge graphs instead of raw SQL, publishing data agents to M365 Copilot, and orchestrating multi-agent pipelines via Fabric notebooks. Key topics include: creating ontologies from semantic models in Fabric for faster agent grounding, evaluating data agents via SDK before production deployment, combining data from Fabric and M365 sources in Copilot Studio, and monitoring all agent interactions through Microsoft Purview for compliance and governance.