diff --git a/specification/app/resource-manager/Microsoft.App/preview/2023-05-02-preview/ContainerApps.json b/specification/app/resource-manager/Microsoft.App/preview/2023-05-02-preview/ContainerApps.json
index e0a83fc01aca..d4c0aff57af9 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2023-05-02-preview/ContainerApps.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2023-05-02-preview/ContainerApps.json
@@ -961,6 +961,16 @@
         "corsPolicy": {
           "description": "CORS policy for container app",
           "$ref": "#/definitions/CorsPolicy"
+        },
+        "additionalPortMappings": {
+          "description": "Settings to expose additional ports on container app",
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/IngressPortMapping"
+          },
+          "x-ms-identifiers": [
+            "targetPort"
+          ]
         }
       }
     },
@@ -1166,6 +1176,30 @@
         }
       }
     },
+    "IngressPortMapping": {
+      "description": "Port mappings of container app ingress",
+      "type": "object",
+      "required": [
+        "external",
+        "targetPort"
+      ],
+      "properties": {
+        "external": {
+          "description": "Specifies whether the app port is accessible outside of the environment",
+          "type": "boolean"
+        },
+        "targetPort": {
+          "format": "int32",
+          "description": "Specifies the port user's container listens on",
+          "type": "integer"
+        },
+        "exposedPort": {
+          "format": "int32",
+          "description": "Specifies the exposed port for the target port. If not specified, it defaults to target port",
+          "type": "integer"
+        }
+      }
+    },
     "CustomHostnameAnalysisResult": {
       "description": "Custom domain analysis.",
       "type": "object",
diff --git a/specification/app/resource-manager/Microsoft.App/preview/2023-05-02-preview/examples/ContainerApps_CreateOrUpdate.json b/specification/app/resource-manager/Microsoft.App/preview/2023-05-02-preview/examples/ContainerApps_CreateOrUpdate.json
index 0e88ace4af7e..a90356136e44 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2023-05-02-preview/examples/ContainerApps_CreateOrUpdate.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2023-05-02-preview/examples/ContainerApps_CreateOrUpdate.json
@@ -69,7 +69,18 @@
               ],
               "maxAge": 1234,
               "allowCredentials": true
-            }
+            },
+            "additionalPortMappings": [
+              {
+                "external": true,
+                "targetPort": 1234
+              },
+              {
+                "external": false,
+                "targetPort": 2345,
+                "exposedPort": 3456
+              }
+            ]
           },
           "dapr": {
             "enabled": true,