-Yes, remote event receivers are part of this retirement. Remote event receivers have a dependency on Azure ACS and as such, when Azure ACS is turned off, remote event receivers will not function correctly anymore. Although remote event receivers can still be programmatically added once Azure ACS has fully retired in April 2026, they'll not fire anymore. The recommended path forward is to use [SharePoint Online Web hooks](../apis/webhooks/overview-sharepoint-webhooks). More information on how to transform can be found in the [Transform SharePoint Add-in model Remote Event Receivers to SharePoint Online Webhooks](../sp-add-ins-modernize/from-remote-event-receivers-to-webhooks.md) article. Mentioned links show how to use SharePoint REST to add the web hooks, if you prefer Microsoft Graph then you can achieve the same via [change notifications](https://learn.microsoft.com/graph/webhooks?context=graph%2Fapi%2F1.0&view=graph-rest-1.0) which can add a [subscription for a SharePoint List](https://learn.microsoft.com/graph/api/resources/subscription?view=graph-rest-1.0).
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