1 million documents to 300+agents: Building an enterprise-scale Microsoft 365 Copilot connector

Summary

1 million documents. 100,000+ monthly users. 300+ Copilot Studio agents. Here's what we learned building the Microsoft 365 Copilot connector behind them. Most enterprise knowledge lives in portals and repositories that people trust but rarely visit in the flow of work. That's the gap this connector was built to close. At Microsoft, we built an enterprise-scale Microsoft 365 Copilot connector to make internal documentation available as grounded context across supported Copilot experiences. The connector runs in production today, serving teams across engineering, support, and field roles. Who this post is…