diff --git a/samples/Office365Groups/apiDefinition.swagger.json b/samples/Office365Groups/apiDefinition.swagger.json
index cbbe3397d..d52dc8669 100644
--- a/samples/Office365Groups/apiDefinition.swagger.json
+++ b/samples/Office365Groups/apiDefinition.swagger.json
@@ -341,6 +341,7 @@
           {
             "in": "body",
             "name": "body",
+            "required": true,
             "schema": {
               "properties": {
                 "@odata.id": {