diff --git a/specification/web/resource-manager/Microsoft.Web/stable/2021-03-01/StaticSites.json b/specification/web/resource-manager/Microsoft.Web/stable/2021-03-01/StaticSites.json
index d059cb1e6a14..3015083829d3 100644
--- a/specification/web/resource-manager/Microsoft.Web/stable/2021-03-01/StaticSites.json
+++ b/specification/web/resource-manager/Microsoft.Web/stable/2021-03-01/StaticSites.json
@@ -2891,8 +2891,21 @@
         },
         "provider": {
           "description": "The provider that submitted the last deployment to the primary environment of the static site.",
+          "type": "string"
+        },
+        "enterpriseGradeCdnStatus": {
+          "description": "State indicating the status of the enterprise grade CDN serving traffic to the static web app.",
+          "enum": [
+            "Enabled",
+            "Enabling",
+            "Disabled",
+            "Disabling"
+          ],
           "type": "string",
-          "readOnly": true
+          "x-ms-enum": {
+            "name": "EnterpriseGradeCdnStatus",
+            "modelAsString": true
+          }
         }
       }
     },