---
ms.service: azure-kubernetes-service
ms.topic: include
ms.date: 05/27/2026
author: schaffererin
ms.author: schaffererin
ai-usage: ai-assisted
---

> [!IMPORTANT]
> Starting on **September 30, 2027**, Azure Kubernetes Service (AKS) no longer supports the Open Service Mesh (OSM) add-on. The upstream [Open Service Mesh project](https://www.cncf.io/projects/open-service-mesh/) has been retired.
>
> If your cluster uses the OSM add-on, migrate to the Istio add-on before the end-of-support date. This retirement notice applies only to the managed OSM add-on and doesn't address open-source or self-managed service mesh installations. For migration steps, see [Migration guidance from the OSM add-on to the Istio add-on](../open-service-mesh-istio-migration-guidance.md). To stay informed about AKS announcements and updates, follow the [AKS release notes](https://github.com/Azure/AKS/releases).
