Microsoft Build 2025 keynote recap and announcements

1Satya Nadella framed the event around building an open agentic web at scale.
2GitHub Copilot now has 15 million developers using it.
3GitHub Copilot coding agent is a full agentic partner built into GitHub.
4Microsoft 365 Copilot Tuning lets customers train agents on their own company data.
5Microsoft announced broad first-party support for Model Context Protocol (MCP).
6Windows AI Foundry unifies the AI developer lifecycle for training and inference on Windows.
7NLWeb was introduced as an open project giving websites a conversational, MCP-native interface.
8Microsoft Discovery was unveiled as an agentic AI platform to accelerate scientific R&D.

GitHub Copilot coding agentAsynchronous agentic coding partner built into GitHubAnnounced
Windows AI FoundryUnified platform for the AI developer lifecycle on WindowsAnnounced
Azure AI Foundry Agent ServiceOrchestrates multi-agent workflows; Semantic Kernel + AutoGen in one SDKGA
Microsoft Entra Agent IDAssigns unique identities to agents to prevent agent sprawlPreview
Model Context Protocol supportFirst-party MCP support across GitHub, Foundry, Copilot Studio, Windows 11Announced
NLWebOpen project giving websites a conversational, MCP-native interfaceAnnounced
Microsoft DiscoveryAgentic AI platform for accelerating scientific R&DAnnounced
Microsoft 365 Copilot TuningLow-code agent creation using a company's own dataAnnounced

Build 2025Keynote recap and announcements