2013 2025 2026 Development 
Microsoft Public Sector
DECEMBER 19, 2023
MC693865 — SharePoint Add-In retirement in Microsoft 365 >365 Days Since the release of SharePoint Add-Ins in 2013, Microsoft has evolved SharePoint extensibility using SharePoint Framework (SPFx) enabling you to write applications that can be used in Microsoft SharePoint, Viva Connections and Microsoft Teams.
Microsoft Public Sector
OCTOBER 10, 2023
Developers can create applications that create scenes for meetings, provide notifications to users, populate in-meeting dialogs, and more with meeting app extensibility. Instead we recommend the utilization of Multi Window UI (also known as the new meeting experience), which is where we will continue to invest our development resources.
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