Microsoft 365 Developer Blog

Dev Proxy v0.28 with LLM usage and costs tracking

The latest version of Dev Proxy introduces a new ability to help you understand language models’ usage and costs in your applications, alongsi...

14 days ago

Build like Microsoft: Developer agents in action

Take a deep dive into Athena, an AI-powered collaborative agent, to learn how it was built and how to create your own version of Athena right ...

15 days ago

Office Add-ins announces Copilot agents with add-in actions and more at Build 2025

As part of the expanding capabilities for agents across Microsoft 365, Office Platform announces add-in actions for Copilot agents are availab...

28 days ago

Introducing the Agent Store: Build, publish, and discover agents in Microsoft 365 Copilot

We’re excited to introduce the Agent Store — a centralized, curated marketplace that features agents built by Microsoft, trusted partners, and...

28 days ago

Introducing the Microsoft 365 Agents Toolkit

Read how the Microsoft 365 Agents Toolkit, an evolution of Microsoft Teams Toolkit, is designed to help developers build agents and apps for M...

1 month ago

Introducing Microsoft 365 Copilot APIs

Learn how Microsoft 365 Copilot APIs allow you to build solutions grounded in your organization’s content, context, and permissions, without n...

1 month ago

Exchange Web Services code analyzer and usage report

We are less than 18 months away from the retirement of Exchange Web Services. Start planning your migration from EWS to Microsoft Graph. The p...

1 month ago

Prepare your Office Add-in for the European Accessibility Act (EAA)

Starting June 28, 2025, the European Accessibility Act (EAA) takes effect, requiring all digital products and services offered to EU customers...

1 month ago

Nested App Authentication: Now generally available across Microsoft 365

Get started with Nested App Authentication, a modern protocol for simplifying authentication for Personal Tab Teams apps that run across Micro...

1 month ago

Announcing the updated Teams AI Library and MCP support

Discover the new and improved Teams AI Library, designed to help developers create even more powerful agents for Microsoft Teams. The post Ann...

1 month ago