Attention: SharePoint Remote Event Receivers Retirement - what you need to know and how to migrate
Microsoft has announced the retirement of Remote Event Receivers (RERs) in SharePoint Online. Organizations that still rely on this legacy extensibility model must begin planning their migration immediately to avoid service interruptions. The retirement is closely related to the modernization of SharePoint authentication and the retirement of Azure Access Control Services (Azure ACS). While Microsoft introduced a temporary registration model based on Microsoft Entra applications, this should only be viewed as an interim solution—not a long-term replacement. Retirement Timeline November 1, 2024 – Azure ACS no longer works for newly created Microsoft 365 tenants. April 2, 2026 – Remote Event Receivers registered using Azure ACS stop functioning correctly because Azure ACS is fully retired. July 1, 2027 – ALL Remote Event Receivers stop working , including those registered using Microsoft Entra applications. Important: Remote Event Receivers registered via a Microso...