Copilot: Adding File-Based Context

This session shows how adding files changes Copilot Chat’s reasoning by grounding responses in a clear source of truth. Attendees will learn when to attach files versus when to start with questions, which file types work best, and how to combine files with explicit instructions to improve specificity and reduce hallucination. We’ll walk through single-file and multi-file use cases, including summarization, rewriting, extracting risks/action items, and comparing or consolidating content across documents. The session closes with common mistakes to avoid and how these same skills transfer to licensed Copilot experiences across Microsoft apps.