Showing archive results for March 2026

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.

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.

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

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. 

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.