diff --git a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json
index f1aa3baf0d91..37b2f6332449 100644
--- a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json
+++ b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json
@@ -5098,11 +5098,13 @@
           "type": "string",
           "description": "The identity type.",
           "enum": [
-            "SystemAssigned"
+            "SystemAssigned",
+            "UserAssigned",
+            "SystemAssigned,UserAssigned"
           ],
           "x-ms-enum": {
             "name": "FactoryIdentityType",
-            "modelAsString": false
+            "modelAsString": true
           }
         },
         "principalId": {