Microsoft 365 Developer Blog
A developer platform for building collaborative apps for hybrid work
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SharePoint Framework (SPFx) roadmap update – April 2026
SPFx is powering the future of Microsoft 365 with AI driven portals and deep integrations across SharePoint and Microsoft 365. The April 2026 update shares new ...
Latest posts
SharePoint Framework (SPFx) roadmap update – April 2026
SPFx is powering the future of Microsoft 365 with AI driven portals and deep integrations across SharePoint and Microsoft 365. The April 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.
MCP Apps now available in Copilot chat
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
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
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.
Changes to attachment IDs for inline images in Outlook add-ins
Read how inline image attachments are handled when they’re programmatically added to a mail item's signature or body in Outlook on the web and the new Outlook for Windows
Build business understanding with Dataverse in Microsoft 365 Copilot
Microsoft 365 Copilot is now embedded as an in-app sidecar within Power Apps, Dynamics 365 Sales, and Dynamics 365 Customer Service—removing the need to switch between apps to find context or complete steps.
Prepare your add-in for Outlook ribbon improvements
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
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...
Increased control over Office Add-in user experiences
Customers have asked for greater user control over add-in launch behavior in Office. We are making three adjustments to our platform to address this customer feedback.