Microsoft 365 Developer Blog
Featured posts
SharePoint FrameworkMicrosoft TeamsMicrosoft 365 Developer
Latest posts
MCP Apps now available in Copilot chat
Deepak Pratinidhi
Agents bring rich, app powered UI experiences directly into Microsoft 365 Copilot chat, via MCP Apps or the OpenAI Apps SDK. Read about what customers and partners are building.
Breaking Change Ahead: Graph API Updates to Sensitive Email Properties
Thomas Mechelke
On 12/31/2026, we will begin restricting updates to sensitive properties on non-draft email messages (including subject, body, and recipients). Apps will need Mail-Advanced.ReadWrite (or .All / .Shared) with admin consent to continue modifying these fields. Review your current usage and update permissions now to avoid unexpected failures.
SharePoint Framework (SPFx) roadmap update – March 2026
Vesa Juvonen
SPFx is powering the future of Microsoft 365 with AI driven portals and deep integrations across SharePoint Teams and Viva. The March 2026 update shares new features and the roadmap for the next evolution built for the AI era. This is a transparent community driven journey that we shape together.
Prepare your add-in for Outlook ribbon improvements
Office Extensibility team
We’re improving how add-ins appear on the ribbon in Outlook on the web and the new Outlook on Windows. These updates make add-ins easier to find and align the experience across Outlook clients.
SharePoint Framework (SPFx) roadmap update – February 2026
Vesa Juvonen
We move towards spring 2026 with strong momentum across the SharePoint Framework and an increasing sense of excitement across the ecosystem. SPFx continues to be a foundational platform for building intelligent, secure, and scalable experiences across Microsoft 365, with adoption growing and feedback from customers and partners directly shaping our priorities. Following the December release of SPFx 1.22 and the January announcement of 1.22.2, our focus remains on stability, security, and predictable evolution, while also setting the stage for the next wave of innovation. February is also a special moment for t...
Handling Legacy User Settings in SharePoint Framework
Paolo Pialorsi
Introduction The SharePoint Framework (SPFx) has undergone some important changes in how it handles Entra ID app registration and security models. Here you can find additional details about what was updated and about the new application IDs used by SPFx. These changes have important implications for developers who previously relied on legacy user settings stored through the old application registration model. This article explores the technical challenges and provides practical solutions for handling legacy user settings when transitioning to the new SharePoint Framework security architecture. Understanding the...