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The SharePoint Add-in portions of this article are legacy guidance. The retirement below doesn't retire the other APIs or platforms discussed here.
Important
SharePoint Add-ins reached end of life in SharePoint Online on April 2, 2026. Both SharePoint-hosted and provider-hosted Add-ins are retired and no longer work in SharePoint Online, including government clouds. Add-in development, deployment, and usage guidance is retained for historical reference and for applicable SharePoint Server scenarios, not for new SharePoint Online solutions.
SharePoint Server Add-ins deployed through an on-premises app catalog are not retired by this change. Acquiring SharePoint Add-ins from the public marketplace ended on April 2, 2026 for SharePoint Server.
This retirement does not retire SharePoint REST APIs, CSOM, JSOM, or SharePoint Framework (SPFx). For SharePoint Online, use SPFx for user interface extensions and Microsoft Entra ID for authentication to external applications. See the retirement announcement and Add-in migration guidance.
Solution guidance, including insights and details based on scenarios and functional requirements, for Office 365 development and SharePoint patterns and practices (PnP).
| Read this content | If you want to... |
|---|---|
| Modernizing your classic SharePoint sites | Transform your classic SharePoint sites into modern group-connected sites. |
| Branding and site provisioning | Use SharePoint Add-ins to provision and manage SharePoint site branding. |
| Customizing the "modern" experiences in SharePoint Online | Customize with SharePoint Online "modern" experiences. |
| OneDrive and SharePoint Online Multi-Geo scenarios | OneDrive and SharePoint Online Multi-Geo tenant, which allows multinational corporations that have one or more geographical locations, to expand their Office 365 OneDrive and SharePoint Online tenancy to satisfy data residency requirements. |
| Building SharePoint Online portals | Factor in SharePoint Online specific performance considerations when developing your new portal. |
| Composite business add-ins | Use composite business add-ins to integrate your SharePoint solutions with your business processes and technologies. |
| ECM solutions | Perform common ECM tasks such as setting site policies, uploading files, synchronizing term groups, and more. |
| Localization solutions | Localize your SharePoint site contents and UI text. |
| Search solutions | Find out about the SharePoint search architecture, search APIs, and search add-ins. |
| Security and performance | Improve the security and performance of your SharePoint sites with OAuth, support for Germany, China and US Government environments, cross-domain images, elevated privileges, and external sharing. |
| SharePoint Add-in recipes | Find a list of SharePoint Add-in recipes. |
| Transform farm solutions to the SharePoint Add-in model | Convert your farm solutions to the SharePoint Add-in model. |
| Sandbox solution transformation guidance | Convert your sandbox solutions to the add-in model or alternative solutions. |
| User profile solutions | Work with SharePoint user profile data. |
| Deploying your SharePoint Add-ins | Deploy your SharePoint Add-ins. |
| PnP remote provisioning | Learn about remote provisioning for your Office 365 and SharePoint Online site collections by using features of the add-in model. |
| PnP remote timer job framework | Learn about timer jobs, which are background tasks that operate on your SharePoint sites. |