💡 Our Technical Review in summary
Microsoft has announced the formal retirement of SharePoint Add-Ins (originally introduced in 2013) in favor of the modern SharePoint Framework (SPFx). This retirement follows a phased timeline where installation capabilities will be restricted throughout 2024, leading to a complete shutdown of the service on April 2, 2026. After this final date, SharePoint Add-Ins will cease to function across all Microsoft 365 environments.
#### Impact
- Functional Disruption: All existing SharePoint Add-Ins will stop working after April 2, 2026. There is no option to extend this deadline.
- Marketplace Restrictions: As of July 1, 2024, users can no longer install SharePoint Add-Ins from the public AppSource marketplace.
- New Tenant Blocking: Any Microsoft 365 tenants created after November 1, 2024, are unable to use SharePoint Add-Ins regardless of the source (public or private catalog).
- Legacy Technical Debt: Organizations relying on older web-part models or provider-hosted apps must undergo a significant architectural shift to the SharePoint Framework (SPFx) to maintain functionality.
- Administrative Control: Admins now have the ability to proactively disable Add-Ins at the tenant level via PowerShell to prevent further sprawl.
#### Action Required
- Inventory and Audit: Immediately run the Microsoft 365 Assessment tool to identify all active SharePoint Add-Ins within your tenant and determine which sites are utilizing them.
- Migration Planning: Begin porting custom-coded Add-Ins to the SharePoint Framework (SPFx). SPFx is the current standard for extensibility in SharePoint, Microsoft Teams, and Viva Connections.
- Vendor Engagement: For third-party Add-Ins purchased from vendors, contact the solution providers to request an SPFx-based version or an alternative roadmap.
- Operational Testing: Use the SharePoint Online Management Shell to disable Add-In installations once your migration is complete:
Set-SPOTenant -IsSharePointAddInsDisabled $true. - Stakeholder Communication: Notify developers and site owners of the 2026 deadline. Update internal help desk documentation to reflect that legacy Add-Ins are no longer supported.
Microsoft Official Update
Service: N/A
Category: planForChange
Severity: normal
Updated February 2, 2026: This update serves as a reminder that SharePoint Add-Ins will retire and stop working in 2 months from now (April 2, 2026).
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. With our continued investment in SharePoint Framework, Microsoft is retiring SharePoint Add-Ins.
[Key Points:]
- Major: Retirement
- Timeline:
- Starting July 1st, 2024, SharePoint Add-Ins cannot be installed from the public marketplace, also referred to as store by existing tenants. Installation from a private app catalog stays possible.
- Starting November 1st, 2024, new tenants will not be able use SharePoint Add-Ins, regardless of their origin (public marketplace, private tenant catalog).
- Starting April 2nd, 2026, Microsoft will remove the ability use SharePoint Add-Ins for existing tenants.
- Action: Review and assess impact
[How this will affect your organization:]
If your organization still uses SharePoint Add-Ins, they will no longer function after April 2nd, 2026. We recommend customers to port their customizations to SharePoint Framework (SPFx) and ask their solution vendors for updated solutions.
[What you need to do to prepare]
You will want to notify your Add-In users and developers. Update your user training and prepare your help desk.
For admins
- Use the Microsoft 365 Assessment tool to scan your tenants for SharePoint Add-In usage.
- Disable SharePoint Add-Ins on your tenant using SharePoint Online Management Shell
- Review the guidance for migrating from SharePoint Add-Ins to SharePoint Framework.
- There will not be an option to extend SharePoint Add-Ins beyond April 2nd 2026.
New: How to disable SharePoint Add-Ins on your tenant
Admins can disable SharePoint Add-Ins with the Set-SPOTenant SharePoint Management Shell PowerShell command.
Connect-SPOService -Url https://<tenant>-admin.sharepoint.com
Set-SPOTenant -IsSharePointAddInsDisabled $true
After SharePoint Add-Ins are disabled, users will not be able to add SharePoint Add-Ins to their sites, and admins cannot add new SharePoint Add-Ins to the tenant and site collection app catalogs. SharePoint Add-Ins already added to sites will stay available and can still be used by the site’s users.
New: SharePoint Add-Ins will not be available from the public marketplace
After July 1, 2024, users browsing the public marketplace (AppSource) will see SharePoint Add-In, but if they select Get it now, a message will explain that SharePoint Add-Ins are retired and cannot be added. If you still require a specific SharePoint Add-In, contact the Add-In creator to understand the possible options.
Learn more
- Support update for the retirement of SharePoint Add-Ins in Microsoft 365.
