Microsoft 365 Copilot Wave 3: Multi-Model Intelligence and Agent Cowork Mark Shift From Assistant to Orchestrator

Microsoft 365 Blog·medium signal

Microsoft's March 9, 2026 Wave 3 announcement introduces Copilot Cowork (multi-agent collaborative workspaces), multi-model intelligence routing, and enterprise agent APIs across M365. The Frontier Transformation event positioned Copilot as an orchestrator of multi-agent enterprise workflows rather than a single-assistant tool. Backed by the Azure SRE Agent deployment (1,300+ agents, 35K incidents) as production evidence, Wave 3 represents the most detailed enterprise multi-agent deployment blueprint Microsoft has published.