diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json
index dd653a2a7d6f..9c7b0d7ee85e 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json
@@ -64,6 +64,15 @@
         "description": "Create a new Service or update an exiting Service.",
         "operationId": "Services_CreateOrUpdate",
         "parameters": [
+          {
+            "name": "resource",
+            "in": "body",
+            "description": "Parameters for the create or update operation",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/ServiceResource"
+            }
+          },
           {
             "$ref": "#/parameters/ApiVersionParameter"
           },
@@ -75,15 +84,6 @@
           },
           {
             "$ref": "#/parameters/ServiceNameParameter"
-          },
-          {
-            "name": "resource",
-            "in": "body",
-            "description": "Parameters for the create or update operation",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/ServiceResource"
-            }
           }
         ],
         "responses": {
@@ -167,6 +167,15 @@
         "description": "Operation to update an exiting Service.",
         "operationId": "Services_Update",
         "parameters": [
+          {
+            "name": "resource",
+            "in": "body",
+            "description": "Parameters for the update operation",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/ServiceResource"
+            }
+          },
           {
             "$ref": "#/parameters/ApiVersionParameter"
           },
@@ -178,15 +187,6 @@
           },
           {
             "$ref": "#/parameters/ServiceNameParameter"
-          },
-          {
-            "name": "resource",
-            "in": "body",
-            "description": "Parameters for the update operation",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/ServiceResource"
-            }
           }
         ],
         "responses": {
@@ -270,6 +270,15 @@
         "description": "Regenerate a test key for a Service.",
         "operationId": "Services_RegenerateTestKey",
         "parameters": [
+          {
+            "name": "regenerateTestKeyRequest",
+            "in": "body",
+            "description": "Parameters for the operation",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/RegenerateTestKeyRequestPayload"
+            }
+          },
           {
             "$ref": "#/parameters/ApiVersionParameter"
           },
@@ -281,15 +290,6 @@
           },
           {
             "$ref": "#/parameters/ServiceNameParameter"
-          },
-          {
-            "name": "regenerateTestKeyRequest",
-            "in": "body",
-            "description": "Parameters for the operation",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/RegenerateTestKeyRequestPayload"
-            }
           }
         ],
         "responses": {
@@ -450,6 +450,15 @@
         "description": "Create a new App or update an exiting App.",
         "operationId": "Apps_CreateOrUpdate",
         "parameters": [
+          {
+            "name": "appResource",
+            "in": "body",
+            "description": "Parameters for the create or update operation",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/AppResource"
+            }
+          },
           {
             "$ref": "#/parameters/ApiVersionParameter"
           },
@@ -464,15 +473,6 @@
           },
           {
             "$ref": "#/parameters/AppNameParameter"
-          },
-          {
-            "name": "appResource",
-            "in": "body",
-            "description": "Parameters for the create or update operation",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/AppResource"
-            }
           }
         ],
         "responses": {
@@ -555,6 +555,15 @@
         "description": "Operation to update an exiting App.",
         "operationId": "Apps_Update",
         "parameters": [
+          {
+            "name": "appResource",
+            "in": "body",
+            "description": "Parameters for the update operation",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/AppResource"
+            }
+          },
           {
             "$ref": "#/parameters/ApiVersionParameter"
           },
@@ -569,15 +578,6 @@
           },
           {
             "$ref": "#/parameters/AppNameParameter"
-          },
-          {
-            "name": "appResource",
-            "in": "body",
-            "description": "Parameters for the update operation",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/AppResource"
-            }
           }
         ],
         "responses": {
@@ -755,6 +755,15 @@
         "description": "Create a new Binding or update an exiting Binding.",
         "operationId": "Bindings_CreateOrUpdate",
         "parameters": [
+          {
+            "name": "bindingResource",
+            "in": "body",
+            "description": "Parameters for the create or update operation",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/BindingResource"
+            }
+          },
           {
             "$ref": "#/parameters/ApiVersionParameter"
           },
@@ -772,15 +781,6 @@
           },
           {
             "$ref": "#/parameters/BindingNameParameter"
-          },
-          {
-            "name": "bindingResource",
-            "in": "body",
-            "description": "Parameters for the create or update operation",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/BindingResource"
-            }
           }
         ],
         "responses": {
@@ -856,6 +856,15 @@
         "description": "Operation to update an exiting Binding.",
         "operationId": "Bindings_Update",
         "parameters": [
+          {
+            "name": "bindingResource",
+            "in": "body",
+            "description": "Parameters for the update operation",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/BindingResource"
+            }
+          },
           {
             "$ref": "#/parameters/ApiVersionParameter"
           },
@@ -873,15 +882,6 @@
           },
           {
             "$ref": "#/parameters/BindingNameParameter"
-          },
-          {
-            "name": "bindingResource",
-            "in": "body",
-            "description": "Parameters for the update operation",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/BindingResource"
-            }
           }
         ],
         "responses": {
@@ -953,20 +953,20 @@
         }
       }
     },
-    "/subscriptions/{subscriptionId}/providers/Microsoft.AppPlatform/locations/{location}/checkNameAvailability": {
-      "post": {
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.AppPlatform/Spring/{serviceName}/certificates/{certificateName}": {
+      "get": {
         "tags": [
           "AppPlatform"
         ],
-        "description": "Checks that the resource name is valid and is not already in use.",
-        "operationId": "Services_CheckNameAvailability",
+        "description": "Get the certificate resource.",
+        "operationId": "Certificate_GetAsync",
         "parameters": [
           {
-            "name": "location",
+            "name": "CertificateName",
             "in": "path",
-            "description": "the region",
             "required": true,
-            "type": "string"
+            "type": "string",
+            "pattern": "^[a-z0-9-]{1,127}$"
           },
           {
             "$ref": "#/parameters/ApiVersionParameter"
@@ -975,20 +975,17 @@
             "$ref": "#/parameters/SubscriptionIdParameter"
           },
           {
-            "name": "availabilityParameters",
-            "in": "body",
-            "description": "Parameters supplied to the operation.",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/NameAvailabilityParameters"
-            }
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "$ref": "#/parameters/ServiceNameParameter"
           }
         ],
         "responses": {
           "200": {
-            "description": "Success. The response describes the name availability.",
+            "description": "Success. The response describe the certificate.",
             "schema": {
-              "$ref": "#/definitions/NameAvailability"
+              "$ref": "#/definitions/CertificateResource"
             }
           },
           "default": {
@@ -999,46 +996,56 @@
           }
         },
         "x-ms-examples": {
-          "Services_CheckNameAvailability": {
-            "$ref": "./examples/Services_CheckNameAvailability.json"
+          "Certificate_GetAsync": {
+            "$ref": "./examples/Certificate_GetAsync.json"
           }
         }
-      }
-    },
-    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.AppPlatform/Spring/{serviceName}/apps/{appName}/deployments/{deploymentName}": {
-      "get": {
+      },
+      "put": {
         "tags": [
           "AppPlatform"
         ],
-        "description": "Get a Deployment and its properties.",
-        "operationId": "Deployments_Get",
+        "description": "Create or update certificate resource.",
+        "operationId": "Certificate_CreateOrUpdateAsync",
         "parameters": [
           {
-            "$ref": "#/parameters/ApiVersionParameter"
+            "name": "CertificateName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "pattern": "^[a-z0-9-]{1,127}$"
           },
           {
-            "$ref": "#/parameters/SubscriptionIdParameter"
+            "name": "certificateResource",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/CertificateResource"
+            }
           },
           {
-            "$ref": "#/parameters/ResourceGroupNameParameter"
+            "$ref": "#/parameters/ApiVersionParameter"
           },
           {
-            "$ref": "#/parameters/ServiceNameParameter"
+            "$ref": "#/parameters/SubscriptionIdParameter"
           },
           {
-            "$ref": "#/parameters/AppNameParameter"
+            "$ref": "#/parameters/ResourceGroupNameParameter"
           },
           {
-            "$ref": "#/parameters/DeploymentNameParameter"
+            "$ref": "#/parameters/ServiceNameParameter"
           }
         ],
         "responses": {
           "200": {
-            "description": "Success. The response describes the corresponding Deployment.",
+            "description": "Success. The response describe the existed certificate updated.",
             "schema": {
-              "$ref": "#/definitions/DeploymentResource"
+              "$ref": "#/definitions/CertificateResource"
             }
           },
+          "201": {
+            "description": "Created. The response describe the new certificate created."
+          },
           "default": {
             "description": "Error response describing why the operation failed.",
             "schema": {
@@ -1046,19 +1053,30 @@
             }
           }
         },
+        "x-ms-long-running-operation": true,
+        "x-ms-long-running-operation-options": {
+          "final-state-via": "azure-async-operation"
+        },
         "x-ms-examples": {
-          "Deployments_Get": {
-            "$ref": "./examples/Deployments_Get.json"
+          "Certificate_CreateOrUpdateAsync": {
+            "$ref": "./examples/Certificate_CreateOrUpdateAsync.json"
           }
         }
       },
-      "put": {
+      "delete": {
         "tags": [
           "AppPlatform"
         ],
-        "description": "Create a new Deployment or update an exiting Deployment.",
-        "operationId": "Deployments_CreateOrUpdate",
+        "description": "Delete the certificate resource.",
+        "operationId": "Certificate_DeleteAsync",
         "parameters": [
+          {
+            "name": "CertificateName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "pattern": "^[a-z0-9-]{1,127}$"
+          },
           {
             "$ref": "#/parameters/ApiVersionParameter"
           },
@@ -1070,34 +1088,19 @@
           },
           {
             "$ref": "#/parameters/ServiceNameParameter"
-          },
-          {
-            "$ref": "#/parameters/AppNameParameter"
-          },
-          {
-            "$ref": "#/parameters/DeploymentNameParameter"
-          },
-          {
-            "name": "deploymentResource",
-            "in": "body",
-            "description": "Parameters for the create or update operation",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/DeploymentResource"
-            }
           }
         ],
         "responses": {
-          "201": {
-            "description": "Created. The response describes the new Deployment and contains a Location header to query the\r\noperation result.",
+          "200": {
+            "description": "Success. The response indicates the certificate deleted.",
             "schema": {
-              "$ref": "#/definitions/DeploymentResource"
+              "$ref": "#/definitions/CertificateResource"
             }
           },
-          "200": {
-            "description": "Success. The response describes the updated Deployment.",
+          "204": {
+            "description": "No content. The response indicates the certificate doesn't exist.",
             "schema": {
-              "$ref": "#/definitions/DeploymentResource"
+              "$ref": "#/definitions/CertificateResource"
             }
           },
           "default": {
@@ -1107,23 +1110,28 @@
             }
           }
         },
-        "x-ms-long-running-operation": true,
-        "x-ms-long-running-operation-options": {
-          "final-state-via": "azure-async-operation"
-        },
         "x-ms-examples": {
-          "Deployments_CreateOrUpdate": {
-            "$ref": "./examples/Deployments_CreateOrUpdate.json"
+          "Certificate_DeleteAsync": {
+            "$ref": "./examples/Certificate_DeleteAsync.json"
           }
         }
-      },
-      "delete": {
+      }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.AppPlatform/Spring/{serviceName}/certificates": {
+      "get": {
         "tags": [
           "AppPlatform"
         ],
-        "description": "Operation to delete a Deployment.",
-        "operationId": "Deployments_Delete",
+        "description": "List all the certificates of one user.",
+        "operationId": "Certificate_ListAsync",
         "parameters": [
+          {
+            "name": "CertificateName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "pattern": "^[a-z0-9-]{1,127}$"
+          },
           {
             "$ref": "#/parameters/ApiVersionParameter"
           },
@@ -1135,20 +1143,14 @@
           },
           {
             "$ref": "#/parameters/ServiceNameParameter"
-          },
-          {
-            "$ref": "#/parameters/AppNameParameter"
-          },
-          {
-            "$ref": "#/parameters/DeploymentNameParameter"
           }
         ],
         "responses": {
           "200": {
-            "description": "Success. The response indicates the resource is deleted."
-          },
-          "204": {
-            "description": "Success. The response indicates the resource doesn't exist."
+            "description": "Success. The response describe the custom domain resource list of one application.",
+            "schema": {
+              "$ref": "#/definitions/CertificateResourceCollection"
+            }
           },
           "default": {
             "description": "Error response describing why the operation failed.",
@@ -1158,18 +1160,509 @@
           }
         },
         "x-ms-examples": {
-          "Deployments_Delete": {
-            "$ref": "./examples/Deployments_Delete.json"
+          "Certificate_ListAsync": {
+            "$ref": "./examples/Certificate_ListAsync.json"
           }
         }
-      },
-      "patch": {
+      }
+    },
+    "/subscriptions/{subscriptionId}/providers/Microsoft.AppPlatform/locations/{location}/checkNameAvailability": {
+      "post": {
         "tags": [
           "AppPlatform"
         ],
-        "description": "Operation to update an exiting Deployment.",
-        "operationId": "Deployments_Update",
+        "description": "Checks that the resource name is valid and is not already in use.",
+        "operationId": "Services_CheckNameAvailability",
         "parameters": [
+          {
+            "name": "location",
+            "in": "path",
+            "description": "the region",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "name": "availabilityParameters",
+            "in": "body",
+            "description": "Parameters supplied to the operation.",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/NameAvailabilityParameters"
+            }
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success. The response describes the name availability.",
+            "schema": {
+              "$ref": "#/definitions/NameAvailability"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "Services_CheckNameAvailability": {
+            "$ref": "./examples/Services_CheckNameAvailability.json"
+          }
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.AppPlatform/Spring/{serviceName}/apps/{appName}/domains/{domainName}": {
+      "get": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "description": "Get the custom domain of one lifecycle application.",
+        "operationId": "CustomDomains_GetAsync",
+        "parameters": [
+          {
+            "name": "DomainName",
+            "in": "path",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "$ref": "#/parameters/ServiceNameParameter"
+          },
+          {
+            "$ref": "#/parameters/AppNameParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success. The response describe the custom domain.",
+            "schema": {
+              "$ref": "#/definitions/CustomDomainResource"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "CustomDomains_GetAsync": {
+            "$ref": "./examples/CustomDomains_GetAsync.json"
+          }
+        }
+      },
+      "put": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "description": "Create or update custom domain of one lifecycle application.",
+        "operationId": "CustomDomains_CreateOrUpdateAsync",
+        "parameters": [
+          {
+            "name": "DomainName",
+            "in": "path",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "name": "domainResource",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/CustomDomainResource"
+            }
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "$ref": "#/parameters/ServiceNameParameter"
+          },
+          {
+            "$ref": "#/parameters/AppNameParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success. The response describe the existed custom domain updated.",
+            "schema": {
+              "$ref": "#/definitions/CustomDomainResource"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "CustomDomains_CreateOrUpdateAsync": {
+            "$ref": "./examples/CustomDomains_CreateOrUpdateAsync.json"
+          }
+        }
+      },
+      "delete": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "description": "Delete the custom domain of one lifecycle application.",
+        "operationId": "CustomDomains_DeleteAsync",
+        "parameters": [
+          {
+            "name": "DomainName",
+            "in": "path",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "$ref": "#/parameters/ServiceNameParameter"
+          },
+          {
+            "$ref": "#/parameters/AppNameParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success. The response indicates the custom domain deleted.",
+            "schema": {
+              "$ref": "#/definitions/CustomDomainResource"
+            }
+          },
+          "204": {
+            "description": "No content. The response indicates the custom domain doesn't exist.",
+            "schema": {
+              "$ref": "#/definitions/CustomDomainResource"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "CustomDomains_DeleteAsync": {
+            "$ref": "./examples/CustomDomains_DeleteAsync.json"
+          }
+        }
+      },
+      "patch": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "description": "Update custom domain of one lifecycle application.",
+        "operationId": "CustomDomains_PatchAsync",
+        "parameters": [
+          {
+            "name": "DomainName",
+            "in": "path",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "name": "domainResource",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/CustomDomainResource"
+            }
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "$ref": "#/parameters/ServiceNameParameter"
+          },
+          {
+            "$ref": "#/parameters/AppNameParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success. The response describe the existed custom domain updated.",
+            "schema": {
+              "$ref": "#/definitions/CustomDomainResource"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "CustomDomains_PatchAsync": {
+            "$ref": "./examples/CustomDomains_PatchAsync.json"
+          }
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.AppPlatform/Spring/{serviceName}/apps/{appName}/domains": {
+      "get": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "description": "List the custom domains of one lifecycle application.",
+        "operationId": "CustomDomains_ListAsync",
+        "parameters": [
+          {
+            "name": "DomainName",
+            "in": "path",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "$ref": "#/parameters/ServiceNameParameter"
+          },
+          {
+            "$ref": "#/parameters/AppNameParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success. The response describe the custom domain resource list of one application.",
+            "schema": {
+              "$ref": "#/definitions/CustomDomainResourceCollection"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "CustomDomains_ListAsync": {
+            "$ref": "./examples/CustomDomains_ListAsync.json"
+          }
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.AppPlatform/Spring/{serviceName}/apps/{appName}/deployments/{deploymentName}": {
+      "get": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "description": "Get a Deployment and its properties.",
+        "operationId": "Deployments_Get",
+        "parameters": [
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "$ref": "#/parameters/ServiceNameParameter"
+          },
+          {
+            "$ref": "#/parameters/AppNameParameter"
+          },
+          {
+            "$ref": "#/parameters/DeploymentNameParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success. The response describes the corresponding Deployment.",
+            "schema": {
+              "$ref": "#/definitions/DeploymentResource"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "Deployments_Get": {
+            "$ref": "./examples/Deployments_Get.json"
+          }
+        }
+      },
+      "put": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "description": "Create a new Deployment or update an exiting Deployment.",
+        "operationId": "Deployments_CreateOrUpdate",
+        "parameters": [
+          {
+            "name": "deploymentResource",
+            "in": "body",
+            "description": "Parameters for the create or update operation",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/DeploymentResource"
+            }
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "$ref": "#/parameters/ServiceNameParameter"
+          },
+          {
+            "$ref": "#/parameters/AppNameParameter"
+          },
+          {
+            "$ref": "#/parameters/DeploymentNameParameter"
+          }
+        ],
+        "responses": {
+          "201": {
+            "description": "Created. The response describes the new Deployment and contains a Location header to query the\r\noperation result.",
+            "schema": {
+              "$ref": "#/definitions/DeploymentResource"
+            }
+          },
+          "200": {
+            "description": "Success. The response describes the updated Deployment.",
+            "schema": {
+              "$ref": "#/definitions/DeploymentResource"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        },
+        "x-ms-long-running-operation": true,
+        "x-ms-long-running-operation-options": {
+          "final-state-via": "azure-async-operation"
+        },
+        "x-ms-examples": {
+          "Deployments_CreateOrUpdate": {
+            "$ref": "./examples/Deployments_CreateOrUpdate.json"
+          }
+        }
+      },
+      "delete": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "description": "Operation to delete a Deployment.",
+        "operationId": "Deployments_Delete",
+        "parameters": [
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "$ref": "#/parameters/ServiceNameParameter"
+          },
+          {
+            "$ref": "#/parameters/AppNameParameter"
+          },
+          {
+            "$ref": "#/parameters/DeploymentNameParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success. The response indicates the resource is deleted."
+          },
+          "204": {
+            "description": "Success. The response indicates the resource doesn't exist."
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "Deployments_Delete": {
+            "$ref": "./examples/Deployments_Delete.json"
+          }
+        }
+      },
+      "patch": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "description": "Operation to update an exiting Deployment.",
+        "operationId": "Deployments_Update",
+        "parameters": [
+          {
+            "name": "deploymentResource",
+            "in": "body",
+            "description": "Parameters for the update operation",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/DeploymentResource"
+            }
+          },
           {
             "$ref": "#/parameters/ApiVersionParameter"
           },
@@ -1187,15 +1680,6 @@
           },
           {
             "$ref": "#/parameters/DeploymentNameParameter"
-          },
-          {
-            "name": "deploymentResource",
-            "in": "body",
-            "description": "Parameters for the update operation",
-            "required": true,
-            "schema": {
-              "$ref": "#/definitions/DeploymentResource"
-            }
           }
         ],
         "responses": {
@@ -1634,6 +2118,30 @@
         }
       }
     },
+    "/internal/health": {
+      "get": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "operationId": "Health_Get",
+        "parameters": [
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success"
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        }
+      }
+    },
     "/providers/Microsoft.AppPlatform/operations": {
       "get": {
         "tags": [
@@ -1669,6 +2177,66 @@
           }
         }
       }
+    },
+    "/providers/Microsoft.AppPlatform/runtimeVersions": {
+      "get": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "description": "You can directly pass \"{value[i].value}\" attribute (in the response) to all deployment CRUD operations.",
+        "operationId": "RuntimeVersions_ListRuntimeVersions",
+        "parameters": [
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success. The response describes the details of all supported deployment runtime versions.",
+            "schema": {
+              "$ref": "#/definitions/AvailableRuntimeVersions"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "RuntimeVersions_ListRuntimeVersions": {
+            "$ref": "./examples/RuntimeVersions_ListRuntimeVersions.json"
+          }
+        }
+      }
+    },
+    "/skus": {
+      "get": {
+        "tags": [
+          "AppPlatform"
+        ],
+        "operationId": "Sku_List",
+        "parameters": [
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Success",
+            "schema": {
+              "$ref": "#/definitions/ResourceTypeSkuCollection"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        }
+      }
     }
   },
   "definitions": {
@@ -1685,6 +2253,10 @@
           "$ref": "#/definitions/ClusterResourceProperties",
           "description": "Properties of the Service resource",
           "x-ms-client-flatten": false
+        },
+        "sku": {
+          "$ref": "#/definitions/Sku",
+          "description": "Sku of the Service resource"
         }
       }
     },
@@ -1777,6 +2349,22 @@
         }
       }
     },
+    "Sku": {
+      "description": "Sku of Azure Spring Cloud",
+      "type": "object",
+      "properties": {
+        "name": {
+          "description": "Name of the Sku",
+          "type": "string",
+          "readOnly": true
+        },
+        "tier": {
+          "description": "Tier of the Sku",
+          "type": "string",
+          "readOnly": true
+        }
+      }
+    },
     "ConfigServerProperties": {
       "description": "Config server git properties payload",
       "type": "object",
@@ -2075,7 +2663,8 @@
             "Succeeded",
             "Failed",
             "Creating",
-            "Updating"
+            "Updating",
+            "Deleting"
           ],
           "type": "string",
           "readOnly": true,
@@ -2256,6 +2845,61 @@
         }
       }
     },
+    "CertificateResource": {
+      "description": "Certificate resource payload.",
+      "type": "object",
+      "allOf": [
+        {
+          "$ref": "#/definitions/Resource"
+        }
+      ],
+      "properties": {
+        "properties": {
+          "$ref": "#/definitions/CertificateProperties",
+          "description": "Properties of the certificate resource payload."
+        }
+      }
+    },
+    "CertificateProperties": {
+      "description": "Certificate resource payload.",
+      "required": [
+        "keyvaultCertificateName",
+        "vaultUri"
+      ],
+      "type": "object",
+      "properties": {
+        "keyvaultResourceId": {
+          "description": "The resource id of user keyvault.",
+          "type": "string"
+        },
+        "keyvaultCertificateName": {
+          "description": "The certificate name of user keyvault.",
+          "type": "string"
+        },
+        "vaultUri": {
+          "description": "The vault uri of user key vault.",
+          "type": "string"
+        }
+      }
+    },
+    "CertificateResourceCollection": {
+      "description": "Collection compose of certificate resources list and a possible link for next page.",
+      "type": "object",
+      "properties": {
+        "resources": {
+          "description": "The certificate resources list.",
+          "uniqueItems": false,
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/CertificateResource"
+          }
+        },
+        "nextLink": {
+          "description": "The link to next page of certificate list.",
+          "type": "string"
+        }
+      }
+    },
     "NameAvailabilityParameters": {
       "description": "Name availability parameters payload",
       "required": [
@@ -2293,6 +2937,56 @@
       },
       "readOnly": true
     },
+    "CustomDomainResource": {
+      "description": "Custom domain resource payload.",
+      "type": "object",
+      "allOf": [
+        {
+          "$ref": "#/definitions/Resource"
+        }
+      ],
+      "properties": {
+        "properties": {
+          "$ref": "#/definitions/CustomDomainProperties",
+          "description": "Properties of the custom domain resource."
+        }
+      }
+    },
+    "CustomDomainProperties": {
+      "description": "Custom domain of app resource payload.",
+      "required": [
+        "name"
+      ],
+      "type": "object",
+      "properties": {
+        "name": {
+          "description": "The name of custom domain.",
+          "type": "string"
+        },
+        "thumbprint": {
+          "description": "The thumbprint of bound ceritifcate.",
+          "type": "string"
+        }
+      }
+    },
+    "CustomDomainResourceCollection": {
+      "description": "Collection compose of a custom domain resources list and a possible link for next page.",
+      "type": "object",
+      "properties": {
+        "resources": {
+          "description": "The custom domain resources list.",
+          "uniqueItems": false,
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/CustomDomainResource"
+          }
+        },
+        "nextLink": {
+          "description": "The link to next page of custom domain list.",
+          "type": "string"
+        }
+      }
+    },
     "DeploymentResource": {
       "description": "Deployment resource payload",
       "type": "object",
@@ -2328,7 +3022,8 @@
             "Creating",
             "Updating",
             "Succeeded",
-            "Failed"
+            "Failed",
+            "Deleting"
           ],
           "type": "string",
           "readOnly": true,
@@ -2350,7 +3045,8 @@
             "Failed",
             "Allocating",
             "Upgrading",
-            "Compiling"
+            "Compiling",
+            "Processing"
           ],
           "type": "string",
           "readOnly": true,
@@ -2389,6 +3085,7 @@
           "description": "Type of the source uploaded",
           "enum": [
             "Jar",
+            "NetCoreZip",
             "Source"
           ],
           "type": "string",
@@ -2435,6 +3132,10 @@
           "description": "JVM parameter",
           "type": "string"
         },
+        "netCoreMainEntryPath": {
+          "description": "The path to the .NET executable relative to zip root",
+          "type": "string"
+        },
         "instanceCount": {
           "format": "int32",
           "description": "Instance count",
@@ -2454,7 +3155,8 @@
           "description": "Runtime version",
           "enum": [
             "Java_8",
-            "Java_11"
+            "Java_11",
+            "NetCore_31"
           ],
           "type": "string",
           "x-ms-enum": {
@@ -2724,6 +3426,123 @@
         "displayName": {
           "description": "Localized friendly display name of the dimension",
           "type": "string"
+        },
+        "toBeExportedForShoebox": {
+          "description": "Whether this dimension should be included for the Shoebox export scenario",
+          "type": "boolean"
+        }
+      }
+    },
+    "AvailableRuntimeVersions": {
+      "type": "object",
+      "properties": {
+        "value": {
+          "description": "A list of all supported runtime versions.",
+          "uniqueItems": false,
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/SupportedRuntimeVersion"
+          },
+          "readOnly": true
+        }
+      },
+      "readOnly": true
+    },
+    "SupportedRuntimeVersion": {
+      "description": "Supported deployment runtime version descriptor.",
+      "type": "object",
+      "properties": {
+        "value": {
+          "description": "The raw value which could be passed to deployment CRUD operations.",
+          "enum": [
+            "Java_8",
+            "Java_11",
+            "NetCore_31"
+          ],
+          "type": "string",
+          "x-ms-enum": {
+            "name": "RuntimeVersion",
+            "modelAsString": true
+          }
+        },
+        "platform": {
+          "description": "The platform of this runtime version (possible values: \"Java\" or \".NET\").",
+          "enum": [
+            "Java",
+            ".NET Core"
+          ],
+          "type": "string",
+          "x-ms-enum": {
+            "name": "RuntimePlatform",
+            "modelAsString": true
+          }
+        },
+        "version": {
+          "description": "The detailed version (major.minor) of the platform.",
+          "type": "string"
+        }
+      },
+      "readOnly": true
+    },
+    "ResourceTypeSkuCollection": {
+      "description": "Collection of supported Skus of Azure Spring Cloud resources",
+      "type": "object",
+      "properties": {
+        "value": {
+          "description": "Collection of supported Skus",
+          "uniqueItems": false,
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/ResourceTypeSku"
+          }
+        }
+      }
+    },
+    "ResourceTypeSku": {
+      "description": "Supported Skus of Azure Spring Cloud resources",
+      "type": "object",
+      "properties": {
+        "resourceType": {
+          "description": "Resource type",
+          "type": "string"
+        },
+        "skus": {
+          "description": "Supported Skus",
+          "uniqueItems": false,
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/SkuSetting"
+          }
+        }
+      }
+    },
+    "SkuSetting": {
+      "description": "Supported Sku settings of Azure Spring Cloud",
+      "type": "object",
+      "properties": {
+        "name": {
+          "description": "Name of the Sku",
+          "type": "string"
+        },
+        "tier": {
+          "description": "Tier of the Sku",
+          "type": "string"
+        },
+        "locations": {
+          "description": "Locations of the Sku",
+          "uniqueItems": false,
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
+        },
+        "requiredFeatures": {
+          "description": "Required features of the Sku",
+          "uniqueItems": false,
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
         }
       }
     },
@@ -2839,4 +3658,4 @@
       ]
     }
   ]
-}
+}
\ No newline at end of file
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_CreateOrUpdateAsync.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_CreateOrUpdateAsync.json
new file mode 100644
index 000000000000..cf9dc9858e5f
--- /dev/null
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_CreateOrUpdateAsync.json
@@ -0,0 +1,31 @@
+{
+  "parameters": {
+    "parameters": {
+      "properties": {
+        "keyvaultResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myresourcegroup/providers/Microsoft.KeyVault/vaults/myvault",
+        "keyvaultCertificateName": "mycert",
+        "vaultUri": "https://myvault.vault-int.azure-int.net"
+      },
+      "type": "Microsoft.AppPlatform/Spring/certificates"
+    },
+    "api-version": "2019-05-01-preview",
+    "subscriptionId": "00000000-0000-0000-0000-000000000000",
+    "resourceGroupName": "myResourceGroup",
+    "serviceName": "myservice",
+    "certificateName": "mycertificate"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "properties": {
+          "keyvaultResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myresourcegroup/providers/Microsoft.KeyVault/vaults/myvault",
+          "keyvaultCertificateName": "mycert",
+          "vaultUri": "https://myvault.vault-int.azure-int.net"
+        },
+        "type": "Microsoft.AppPlatform/Spring/certificates",
+        "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.AppPlatform/Spring/myservice/certificates/mycertificate",
+        "name": "mycertificate"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_DeleteAsync.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_DeleteAsync.json
new file mode 100644
index 000000000000..da353db0f803
--- /dev/null
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_DeleteAsync.json
@@ -0,0 +1,21 @@
+{
+  "parameters": {
+    "parameters": {
+      "properties": {
+        "keyvaultResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myresourcegroup/providers/Microsoft.KeyVault/vaults/myvault",
+        "keyvaultCertificateName": "mycert",
+        "vaultUri": "https://myvault.vault-int.azure-int.net"
+      },
+      "type": "Microsoft.AppPlatform/Spring/certificates"
+    },
+    "api-version": "2019-05-01-preview",
+    "subscriptionId": "00000000-0000-0000-0000-000000000000",
+    "resourceGroupName": "myResourceGroup",
+    "serviceName": "myservice",
+    "certificateName": "mycertificate"
+  },
+  "responses": {
+    "200": {},
+    "204": {}
+  }
+}
\ No newline at end of file
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_GetAsync.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_GetAsync.json
new file mode 100644
index 000000000000..cf9dc9858e5f
--- /dev/null
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_GetAsync.json
@@ -0,0 +1,31 @@
+{
+  "parameters": {
+    "parameters": {
+      "properties": {
+        "keyvaultResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myresourcegroup/providers/Microsoft.KeyVault/vaults/myvault",
+        "keyvaultCertificateName": "mycert",
+        "vaultUri": "https://myvault.vault-int.azure-int.net"
+      },
+      "type": "Microsoft.AppPlatform/Spring/certificates"
+    },
+    "api-version": "2019-05-01-preview",
+    "subscriptionId": "00000000-0000-0000-0000-000000000000",
+    "resourceGroupName": "myResourceGroup",
+    "serviceName": "myservice",
+    "certificateName": "mycertificate"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "properties": {
+          "keyvaultResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myresourcegroup/providers/Microsoft.KeyVault/vaults/myvault",
+          "keyvaultCertificateName": "mycert",
+          "vaultUri": "https://myvault.vault-int.azure-int.net"
+        },
+        "type": "Microsoft.AppPlatform/Spring/certificates",
+        "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.AppPlatform/Spring/myservice/certificates/mycertificate",
+        "name": "mycertificate"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_ListAsync.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_ListAsync.json
new file mode 100644
index 000000000000..aacca4d81791
--- /dev/null
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Certificate_ListAsync.json
@@ -0,0 +1,27 @@
+{
+  "parameters": {
+    "api-version": "2019-05-01-preview",
+    "subscriptionId": "00000000-0000-0000-0000-000000000000",
+    "resourceGroupName": "myResourceGroup",
+    "serviceName": "myService"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "resources": [
+          {
+            "properties": {
+              "keyvaultResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myresourcegroup/providers/Microsoft.KeyVault/vaults/myvault",
+              "keyvaultCertificateName": "mycert",
+              "vaultUri": "https://myvault.vault-int.azure-int.net"
+            },
+            "type": "Microsoft.AppPlatform/Spring/certificates",
+            "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.AppPlatform/Spring/myservice/certificates/mycertificate",
+            "name": "mycertificate"
+          }
+        ],
+        "nextLink": "Uri for next page"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_CreateOrUpdateAsync.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_CreateOrUpdateAsync.json
new file mode 100644
index 000000000000..371f434441c8
--- /dev/null
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_CreateOrUpdateAsync.json
@@ -0,0 +1,28 @@
+{
+  "parameters": {
+    "parameters": {
+      "properties": {
+        "name": "myDomain.com"
+      },
+      "type": "Microsoft.AppPlatform/Spring/apps/domains"
+    },
+    "api-version": "2019-05-01-preview",
+    "subscriptionId": "00000000-0000-0000-0000-000000000000",
+    "resourceGroupName": "myResourceGroup",
+    "serviceName": "myservice",
+    "appName": "myapp",
+    "domainName": "myDomain.com"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "properties": {
+          "name": "mydomain.com"
+        },
+        "type": "Microsoft.AppPlatform/Spring/apps/domains",
+        "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.AppPlatform/Spring/myservice/apps/myapp/domains/mydomain.com",
+        "name": "mydomain.com"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_DeleteAsync.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_DeleteAsync.json
new file mode 100644
index 000000000000..a5592546570b
--- /dev/null
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_DeleteAsync.json
@@ -0,0 +1,20 @@
+{
+  "parameters": {
+    "parameters": {
+      "properties": {
+        "name": "myDomain.com"
+      },
+      "type": "Microsoft.AppPlatform/Spring/apps/domains"
+    },
+    "api-version": "2019-05-01-preview",
+    "subscriptionId": "00000000-0000-0000-0000-000000000000",
+    "resourceGroupName": "myResourceGroup",
+    "serviceName": "myservice",
+    "appName": "myapp",
+    "domainName": "myDomain.com"
+  },
+  "responses": {
+    "200": {},
+    "204": {}
+  }
+}
\ No newline at end of file
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_GetAsync.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_GetAsync.json
new file mode 100644
index 000000000000..371f434441c8
--- /dev/null
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_GetAsync.json
@@ -0,0 +1,28 @@
+{
+  "parameters": {
+    "parameters": {
+      "properties": {
+        "name": "myDomain.com"
+      },
+      "type": "Microsoft.AppPlatform/Spring/apps/domains"
+    },
+    "api-version": "2019-05-01-preview",
+    "subscriptionId": "00000000-0000-0000-0000-000000000000",
+    "resourceGroupName": "myResourceGroup",
+    "serviceName": "myservice",
+    "appName": "myapp",
+    "domainName": "myDomain.com"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "properties": {
+          "name": "mydomain.com"
+        },
+        "type": "Microsoft.AppPlatform/Spring/apps/domains",
+        "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.AppPlatform/Spring/myservice/apps/myapp/domains/mydomain.com",
+        "name": "mydomain.com"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_ListAsync.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_ListAsync.json
new file mode 100644
index 000000000000..8780759e8208
--- /dev/null
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_ListAsync.json
@@ -0,0 +1,26 @@
+{
+  "parameters": {
+    "api-version": "2019-05-01-preview",
+    "subscriptionId": "00000000-0000-0000-0000-000000000000",
+    "resourceGroupName": "myResourceGroup",
+    "serviceName": "myservice",
+    "appName": "myapp"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "resources": [
+          {
+            "properties": {
+              "name": "mydomain.com"
+            },
+            "type": "Microsoft.AppPlatform/Spring/apps/domains",
+            "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.AppPlatform/Spring/myservice/apps/myapp/domains/mydomain.com",
+            "name": "mydomain.com"
+          }
+        ],
+        "nextLink": "Uri for next page"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_PatchAsync.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_PatchAsync.json
new file mode 100644
index 000000000000..446b77333b5e
--- /dev/null
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_PatchAsync.json
@@ -0,0 +1,29 @@
+{
+  "parameters": {
+    "parameters": {
+      "properties": {
+        "name": "myDomain.com",
+        "thumbprint": "934367bf1c97033f877db0f15cb1b586957d3133"
+      },
+      "type": "Microsoft.AppPlatform/Spring/apps/domains"
+    },
+    "api-version": "2019-05-01-preview",
+    "subscriptionId": "00000000-0000-0000-0000-000000000000",
+    "resourceGroupName": "myResourceGroup",
+    "serviceName": "myservice",
+    "appName": "myapp",
+    "domainName": "myDomain.com"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "properties": {
+          "name": "mydomain.com"
+        },
+        "type": "Microsoft.AppPlatform/Spring/apps/domains",
+        "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.AppPlatform/Spring/myservice/apps/myapp/domains/mydomain.com",
+        "name": "mydomain.com"
+      }
+    }
+  }
+}
\ No newline at end of file