diff --git a/specification/keyvault/resource-manager/Microsoft.KeyVault/preview/2021-04-01-preview/common.json b/specification/keyvault/resource-manager/Microsoft.KeyVault/preview/2021-04-01-preview/common.json
index 49b1026fce06..62e88433aed2 100644
--- a/specification/keyvault/resource-manager/Microsoft.KeyVault/preview/2021-04-01-preview/common.json
+++ b/specification/keyvault/resource-manager/Microsoft.KeyVault/preview/2021-04-01-preview/common.json
@@ -76,5 +76,16 @@
         "modelAsString": true
       }
     }
+  },
+  "securityDefinitions": {
+    "azure_auth": {
+      "type": "oauth2",
+      "authorizationUrl": "https://login.microsoftonline.com/common/oauth2/authorize",
+      "flow": "implicit",
+      "description": "Azure Active Directory OAuth2 Flow",
+      "scopes": {
+        "user_impersonation": "impersonate your user account"
+      }
+    }
   }
 }
diff --git a/specification/keyvault/resource-manager/Microsoft.KeyVault/preview/2021-04-01-preview/secrets.json b/specification/keyvault/resource-manager/Microsoft.KeyVault/preview/2021-04-01-preview/secrets.json
index f2072d8a3c01..417dbbda91aa 100644
--- a/specification/keyvault/resource-manager/Microsoft.KeyVault/preview/2021-04-01-preview/secrets.json
+++ b/specification/keyvault/resource-manager/Microsoft.KeyVault/preview/2021-04-01-preview/secrets.json
@@ -271,6 +271,12 @@
             "schema": {
               "$ref": "#/definitions/SecretListResult"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "common.json#/definitions/CloudError"
+            }
           }
         },
         "x-ms-examples": {
@@ -300,24 +306,24 @@
         "nbf": {
           "x-ms-client-name": "NotBefore",
           "type": "integer",
-          "format": "unixtime",
+          "format": "int64",
           "description": "Not before date in seconds since 1970-01-01T00:00:00Z."
         },
         "exp": {
           "x-ms-client-name": "Expires",
           "type": "integer",
-          "format": "unixtime",
+          "format": "int64",
           "description": "Expiry date in seconds since 1970-01-01T00:00:00Z."
         },
         "created": {
           "type": "integer",
-          "format": "unixtime",
+          "format": "int64",
           "readOnly": true,
           "description": "Creation time in seconds since 1970-01-01T00:00:00Z."
         },
         "updated": {
           "type": "integer",
-          "format": "unixtime",
+          "format": "int64",
           "readOnly": true,
           "description": "Last updated time in seconds since 1970-01-01T00:00:00Z."
         }