CodeGen from PR 14005 in Azure/azure-rest-api-specs

Merge 7888936eaaf6ce2043f33b46a2f67ca002051d52 into bff78c12eca3ca6212bfd61ea6a898643ebc2c72

Author: SDKAuto

schemas/2020-09-01/Microsoft.StorageSync.json

@@ -468,6 +468,21 @@
           ],
           "description": "Policy for how namespace and files are recalled during FastDr."
         },
+        "initialUploadPolicy": {
+          "oneOf": [
+            {
+              "type": "string",
+              "enum": [
+                "ServerAuthoritative",
+                "Merge"
+              ]
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Policy for how the initial upload sync session is performed."
+        },
         "localCacheMode": {
           "oneOf": [
             {