diff --git a/specification/containerservice/resource-manager/Microsoft.ContainerService/aks/preview/2025-05-02-preview/managedClusters.json b/specification/containerservice/resource-manager/Microsoft.ContainerService/aks/preview/2025-05-02-preview/managedClusters.json
index 35b66c652bb9..d704fbbe3d63 100644
--- a/specification/containerservice/resource-manager/Microsoft.ContainerService/aks/preview/2025-05-02-preview/managedClusters.json
+++ b/specification/containerservice/resource-manager/Microsoft.ContainerService/aks/preview/2025-05-02-preview/managedClusters.json
@@ -8230,6 +8230,13 @@
       }
     },
     "LocalDNSOverrides": {
+      "type": "object",
+      "additionalProperties": {
+        "$ref": "#/definitions/LocalDNSOverride"
+      },
+      "description": "LocalDNSOverrides is a map of zone names for Vnet and Kube DNS overrides."
+    },
+    "LocalDNSOverride": {
       "type": "object",
       "description": "Overrides for localDNS profile.",
       "properties": {
@@ -8374,7 +8381,7 @@
             ]
           },
           "description": "Policy for serving stale data. See [cache plugin](https://coredns.io/plugins/cache) for more information.",
-          "default": "Verify"
+          "default": "Immediate"
         }
       }
     },
diff --git a/specification/containerservice/resource-manager/Microsoft.ContainerService/aks/readme.md b/specification/containerservice/resource-manager/Microsoft.ContainerService/aks/readme.md
index c001709473a1..e291fd9a70b1 100644
--- a/specification/containerservice/resource-manager/Microsoft.ContainerService/aks/readme.md
+++ b/specification/containerservice/resource-manager/Microsoft.ContainerService/aks/readme.md
@@ -1357,4 +1357,8 @@ directive:
     from: managedClusters.json
     where: $.definitions.MachineKubernetesProfile.properties.nodeLabels
     reason: User defined custom key-value pairs, similar to the allowed "user defined tags." These pairs can have any value, as there is no validation on the values
+  - suppress: AvoidAdditionalProperties
+    from: managedClusters.json
+    where: $.definitions.LocalDNSOverrides
+    reason: User defined custom key-value pairs, similar to the allowed "user defined tags." These pairs can have any value, as there is no validation on the values
 ```