The pace of innovation in AI agents has never been faster, and Microsoft Build 2025 marked a pivotal moment for both developers and organizations looking to harness the power of collaborative, intelligent agents. Below, I’ll walk through the major announcements, new frameworks, and hands-on guides—providing direct links and practical context to help you dive in and start building.

Teams AI Library & MCP: Accelerating Agent Development

The new Teams AI Library is designed to let you build powerful Teams agents up to 90% faster. The updated SDK consolidates all core Teams capabilities (Botbuilder, Microsoft Graph, Adaptive Cards, and more) into a single, streamlined package. You’ll spend less time on boilerplate and more on your agent’s unique logic.

Key features:

  • Model Context Protocol (MCP) support: Agents can now share memory and tools, enabling sophisticated multi-agent workflows.
  • Adaptive Cards: Easily embed rich, interactive content in Teams chats.
  • Quick-start coding: Build a basic agent in minutes with the new SDK.

Get started:

Microsoft 365 Copilot Studio: Multi-Agent Orchestration & Tuning

Microsoft 365 Copilot Studio now empowers organizations to create, tune, and orchestrate custom agents with enterprise-grade security and compliance. The Copilot Tuning feature lets you train Copilot using your own data and workflows—no code required. Multi-agent orchestration (in preview) enables teams of agents to collaborate, delegate tasks, and deliver unified results.

Key features:

  • Copilot Tuning: Low-code, domain-specific agent training.
  • Multi-agent orchestration: Agents collaborate across workflows and apps.
  • BYOM (Bring Your Own Model): Integrate 1,900+ Azure AI Foundry models.
  • Entra Agent ID & Purview DLP: Secure, compliant agent identity and data protection.

Guides and resources:

NLWeb: Conversational Interfaces for the Open Agentic Web

NLWeb is Microsoft’s new open-source project announced at Build 2025, aiming to make conversational AI a native part of the web. With just a few lines of code, you can add a chatbot to any website, powered by the AI model of your choice and your own data. NLWeb leverages Schema.org and RSS, making your site’s content discoverable and accessible to AI agents and platforms that support MCP.

Key features:

  • Conversational interface: Add a chat field to any website.
  • MCP compatibility: Share data with external agents.
  • Provider-agnostic: Works with OpenAI, Anthropic, Google, and more.

Guides and news:

Azure AI Foundry & OpenAI Workshop: Custom Models and Agent Integration

Azure AI Foundry provides access to over 1,900 models and seamless integration with your custom agents. The OpenAI Workshop offers hands-on materials for building intelligent solutions on OpenAI, including prompt engineering, agent workflows, and deployment guides.

Resources:

Agent Accelerator Templates & MCP Server: Rapid Prototyping

Accelerate your agent projects with ready-made templates and easy-to-deploy MCP server guides:

  • Teams Agent Accelerator Templates: Prebuilt samples for Teams agents.
  • MCP server guides: Deploy secure agent networks quickly.

Resources:

Community, Demos, and Video Guides

Summary: The Agentic Web Is Here

Microsoft’s Build 2025 announcements and open-source releases—NLWeb, Teams AI Library, Copilot Studio’s orchestration, Azure AI Foundry, and more—are lowering the barrier for anyone to build, customize, and deploy powerful, collaborative AI agents. Whether you’re looking to add conversational AI to your website, automate enterprise workflows with multi-agent systems, or tune domain-specific copilots, the resources above will get you there faster than ever.

Explore, experiment, and share your agentic journey—because the future of the web is not just interactive, but truly collaborative.