diff --git a/sdk/operationalinsights/arm-operationalinsights/LICENSE.txt b/sdk/operationalinsights/arm-operationalinsights/LICENSE.txt
index ea8fb1516028..2d3163745319 100644
--- a/sdk/operationalinsights/arm-operationalinsights/LICENSE.txt
+++ b/sdk/operationalinsights/arm-operationalinsights/LICENSE.txt
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2020 Microsoft
+Copyright (c) 2021 Microsoft
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/sdk/operationalinsights/arm-operationalinsights/src/models/index.ts b/sdk/operationalinsights/arm-operationalinsights/src/models/index.ts
index 7ad0bf333eac..f87a8b138191 100644
--- a/sdk/operationalinsights/arm-operationalinsights/src/models/index.ts
+++ b/sdk/operationalinsights/arm-operationalinsights/src/models/index.ts
@@ -22,7 +22,7 @@ export interface DataExport extends BaseResource {
   /**
    * An array of tables to export, for example: [“Heartbeat, SecurityEvent”].
    */
-  tableNames?: string[];
+  tableNames: string[];
   /**
    * The destination resource ID. This can be copied from the Properties entry of the destination
    * resource in Azure.
diff --git a/sdk/operationalinsights/arm-operationalinsights/src/models/mappers.ts b/sdk/operationalinsights/arm-operationalinsights/src/models/mappers.ts
index f39fbab6dcaa..a8a87a35f6a0 100644
--- a/sdk/operationalinsights/arm-operationalinsights/src/models/mappers.ts
+++ b/sdk/operationalinsights/arm-operationalinsights/src/models/mappers.ts
@@ -25,6 +25,7 @@ export const DataExport: msRest.CompositeMapper = {
         }
       },
       tableNames: {
+        required: true,
         serializedName: "properties.tableNames",
         type: {
           name: "Sequence",