diff --git a/specification/containerservice/resource-manager/Microsoft.ContainerService/preview/2022-01-02-preview/managedClusters.json b/specification/containerservice/resource-manager/Microsoft.ContainerService/preview/2022-01-02-preview/managedClusters.json
index 93fc0cfb86a0..0ce8aaf41f58 100644
--- a/specification/containerservice/resource-manager/Microsoft.ContainerService/preview/2022-01-02-preview/managedClusters.json
+++ b/specification/containerservice/resource-manager/Microsoft.ContainerService/preview/2022-01-02-preview/managedClusters.json
@@ -4273,13 +4273,6 @@
           },
           "description": "The list of AAD group object IDs that will have admin role of the cluster."
         },
-        "adminUsers": {
-          "type": "array",
-          "items": {
-            "type": "string"
-          },
-          "description": "The list of admin users that will have admin role of the cluster. For users in the same tenant, user principal name should be used; for users in different tenant, user object ID should be used."
-        },
         "clientAppID": {
           "type": "string",
           "description": "The client AAD application ID."