diff --git a/schemas/2020-02-02/Microsoft.Insights.Application.json b/schemas/2020-02-02/Microsoft.Insights.Application.json
index f26da976e7..10a9111a17 100644
--- a/schemas/2020-02-02/Microsoft.Insights.Application.json
+++ b/schemas/2020-02-02/Microsoft.Insights.Application.json
@@ -214,6 +214,17 @@
           ],
           "description": "Describes what tool created this Application Insights component. Customers using this API should set this to the default 'rest'."
         },
+        "RetentionInDays": {
+          "oneOf": [
+            {
+              "type": "integer"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Retention period in days."
+        },
         "SamplingPercentage": {
           "oneOf": [
             {