diff --git a/specification/containerservice/resource-manager/Microsoft.ContainerService/preview/2022-04-02-preview/managedClusters.json b/specification/containerservice/resource-manager/Microsoft.ContainerService/preview/2022-04-02-preview/managedClusters.json
index 5e481fb25018..226a98ff0caa 100644
--- a/specification/containerservice/resource-manager/Microsoft.ContainerService/preview/2022-04-02-preview/managedClusters.json
+++ b/specification/containerservice/resource-manager/Microsoft.ContainerService/preview/2022-04-02-preview/managedClusters.json
@@ -4245,6 +4245,15 @@
         "disableRunCommand": {
           "type": "boolean",
           "description": "Whether to disable run command for the cluster or not."
+        },
+        "enableVnetIntegration": {
+          "type": "boolean",
+          "description": "Whether to enable apiserver vnet integration for the cluster or not."
+        },
+        "subnetId": {
+          "type": "string",
+          "title": "The subnet to be used when apiserver vnet integration is enabled.",
+          "description": "It is required when: 1. creating a new cluster with BYO Vnet; 2. updating an existing cluster to enable apiserver vnet integration."
         }
       },
       "description": "Access profile for managed cluster API server."