Limitation

Author: JackStromberg

articles/application-gateway/ingress-controller-overview.md

@@ -77,6 +77,9 @@ With Azure CNI Overlay, please consider the following limitations:
 
 Migration from Kubenet or CNI to Azure CNI Overlay is supported, however it is important to plan your migration to ensure successful migration.
 
+>[!NOTE]
+> Azure CNI Overlay with Application Gateway Ingress Controller is not supported in Azure Government cloud or Microsoft Azure operated by 21Vianet (Azure in China).
+
 >[!WARNING]
 > Ensure the Application Gateway subnet is a /24 or smaller subnet prior to upgrading. Upgrading from CNI to CNI Overlay with a larger subnet (i.e. /23) will lead to an outage and require the Application Gateway subnet to be recreated with a supported subnet size.