Remote Event Receivers in SharePoint Online will be retired

Remote Event Receivers in SharePoint Online will be retired by July 1, 2027. Azure ACS-registered RERs stopped working April 2, 2026. Organizations must migrate to SharePoint webhooks or Microsoft Graph change notifications to avoid disruption, as no extensions beyond this date are possible. What and Why: Microsoft is retiring Remote Event Receivers (RERs) in SharePoint Online as part of the Azure ACS retirement and ongoing modernization of the SharePoint extensibility platform. Remote Event Receivers registered using Azure ACS stopped functioning correctly on April 2, 2026. Remote Event Receivers registered using Microsoft Entra applications will continue to function until July 1, 2027, after which all Remote Event Receivers will stop working. Microsoft recommends migrating affected solutions to SharePoint webhooks or Microsoft Graph change notifications. Rollout Schedule: April 2, 2026: Azure ACS-registered Remote Event Receivers stopped functioning correctly. July 1, 2027: All remote event receivers, including those registered using a Microsoft Entra application, will stop working. No RER will fire events after this date.  Impact on Your Organization: Who is affected: Organizations using SharePoint Online Remote Event Receivers. Developers, solution owners, and third-party vendors supporting SharePoint customizations. Platforms/Services: SharePoint Online Microsoft Entra ID applications SharePoint Add-ins SharePoint webhooks Microsoft Graph change notifications What will happen: Azure ACS-based Remote Event Receivers have already stopped functioning correctly. All remaining Remote Event Receivers will stop firing events after July 1, 2027. Applications and workflows that depend on Remote Event Receivers will no longer receive SharePoint event notifications. Business processes that rely on those events may stop working unless migrated. SharePoint webhooks and Microsoft Graph change notifications are the recommended replacement technologies. SharePoint webhooks are asynchronous. Solutions that depend on synchronously blocking or cancelling actions will need to be redesigned. There will not be an option to extend Remote Event Receivers beyond July 1, 2027. Microsoft currently does not provide a tenant-wide method for administrators to discover Remote Event Receiver usage. We will update this Message Center post, and the associated developer blog post, as soon as a discovery capability is available.  Action Required / Recommendations: Identify any in-house applications or solutions that use Remote Event […]

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