title: (400) Bad Request when deploying a Function App via ARM
body: <p>Hopefully, someone can tell me what I'm doing wrong with this ARM template deployment.</p>
  
  <p>Using the template at the bottom of the question, I can deploy a Function App - with app service plan and storage account - but I get the following error.</p>
  
  <pre><code>STATUS              BadRequest
  PROVISIONING STATE  Failed
  TIMESTAMP           4/19/2017, 1:33:00 PM
  DURATION            1 second
  TYPE                Microsoft.Web/sites/config
  RESOURCE ID         /subscriptions/blah-blah-blah/resourceGroups/blah/providers/Microsoft.Web/sites/functionname/config/appsettings
  STATUSMESSAGE       {
                          "Code": "BadRequest",
                          "Message": "There was a conflict. The remote server returned an error: (400) Bad Request.",
                          "Target": null,
                          "Details": [
                          {
                              "Message": "There was a conflict. The remote server returned an error: (400) Bad Request."
                          },
                          {
                              "Code": "BadRequest"
                          },
                          {
                              "ErrorEntity": {
                                  "ExtendedCode": "01020",
                                  "MessageTemplate": "There was a conflict. {0}",
                                  "Parameters": [
                                      "The remote server returned an error: (400) Bad Request."
                                  ],
                                  "Code": "BadRequest",
                                  "Message": "There was a conflict. The remote server returned an error: (400) Bad Request."
                              }
                          }],
                          "Innererror": null
                      }
  RESOURCE            functionname/appsettings
  </code></pre>
  
  <p>If I remove this AppSetting property from the function app part of the template then the deployment works fine.</p>
  
  <pre><code>"WEBSITE_CONTENTAZUREFILECONNECTIONSTRING": "[concat('DefaultEndpointsProtocol=https;AccountName=',parameters('Storage_Account_Name'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', parameters('Storage_Account_Name')),'2015-05-01-preview').key1)]",
  </code></pre>
  
  <p>But then when I go to the deployed function app I get this error popup.</p>
  
  <pre><code>Error:
  
  'WEBSITE_CONTENTAZUREFILECONNECTIONSTRING' application setting is missing from your app. This setting contains a connection string for an Azure Storage account that is used to host your functions content. Your app will be completely broken without this setting. You may need to delete and recreate this function app if you no longer have access to the value of that application setting.
  </code></pre>
  
  <p>I also note that if I try and add that appsetting in the portal manually after this successful deployment, I get the same error as the initial deployment.</p>
  
  <p>So, I don't know if I'm putting it in the template incorrectly, or if something in the Azure Deployment for functions apps is broken.</p>
  
  <p>Where am I going wrong? </p>
  
  <h2>Template</h2>
  
  <pre><code>{
      "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
      "contentVersion": "1.0.0.0",
      "parameters": {
          "App_Service_Plan_Name": {
              "defaultValue": "aspname",
              "type": "String"
          },
          "Functions_App_Name": {
              "defaultValue": "funcname",
              "type": "String"
          },
          "Storage_Account_Name": {
              "defaultValue": "storagename",
              "type": "String"
          }
      },
      "variables": {},
      "resources": [
          {
              "comments": "Deployed from template",
              "type": "Microsoft.Storage/storageAccounts",
              "name": "[parameters('Storage_Account_Name')]",
              "apiVersion": "2016-01-01",
              "sku": {
                  "name": "Standard_LRS"
              },
              "location": "[resourceGroup().location]",
              "kind": "Storage"
          },
          {
              "comments": "Deployed from template",
              "type": "Microsoft.Web/serverfarms",
              "sku": {
                  "name": "Y1",
                  "tier": "Dynamic",
                  "size": "Y1",
                  "family": "Y",
                  "capacity": 0
              },
              "kind": "functionapp",
              "name": "[parameters('App_Service_Plan_Name')]",
              "apiVersion": "2015-08-01",
              "location": "[resourceGroup().location]",
              "properties": {
                  "name": "[parameters('App_Service_Plan_Name')]",
                  "numberOfWorkers": 0
              },
              "dependsOn": []
          },
          {
              "comments": "Deployed from template",
              "type": "Microsoft.Web/sites",
              "kind": "functionapp",
              "name": "[parameters('Functions_App_Name')]",
              "apiVersion": "2015-08-01",
              "location": "[resourceGroup().location]",
              "properties": {
                  "name": "[parameters('Functions_App_Name')]",
                  "hostNames": [
                      "[concat(parameters('Functions_App_Name'),'.azurewebsites.net')]"
                  ],
                  "enabledHostNames": [
                      "[concat(parameters('Functions_App_Name'),'.azurewebsites.net')]",
                      "[concat(parameters('Functions_App_Name'),'.scm.azurewebsites.net')]"
                  ],
                  "hostNameSslStates": [
                      {
                          "name": "[concat(parameters('Functions_App_Name'),'.azurewebsites.net')]",
                          "sslState": 0,
                          "thumbprint": null,
                          "ipBasedSslState": 0
                      },
                      {
                          "name": "[concat(parameters('Functions_App_Name'),'.scm.azurewebsites.net')]",
                          "sslState": 0,
                          "thumbprint": null,
                          "ipBasedSslState": 0
                      }
                  ],
                  "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', parameters('App_Service_Plan_Name'))]"
              },
              "dependsOn": [
                  "[resourceId('Microsoft.Web/serverfarms', parameters('App_Service_Plan_Name'))]",
                  "[resourceId('Microsoft.Storage/storageAccounts', parameters('Storage_Account_Name'))]"
              ],
              "resources": [
                  {
                      "apiVersion": "2015-08-01",
                      "name": "appsettings",
                      "type": "config",
                      "dependsOn": [
                          "[resourceId('Microsoft.Web/Sites', parameters('Functions_App_Name'))]",
                          "[resourceId('Microsoft.Storage/storageAccounts', parameters('Storage_Account_Name'))]"
                      ],
                      "properties": {
                          "FUNCTIONS_EXTENSION_VERSION": "~1",
                          "AzureWebJobsDashboard": "[concat('DefaultEndpointsProtocol=https;AccountName=',parameters('Storage_Account_Name'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', parameters('Storage_Account_Name')),'2015-05-01-preview').key1)]",
                          "AzureWebJobsStorage": "[concat('DefaultEndpointsProtocol=https;AccountName=',parameters('Storage_Account_Name'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', parameters('Storage_Account_Name')),'2015-05-01-preview').key1)]",
                          "WEBSITE_CONTENTAZUREFILECONNECTIONSTRING": "[concat('DefaultEndpointsProtocol=https;AccountName=',parameters('Storage_Account_Name'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', parameters('Storage_Account_Name')),'2015-05-01-preview').key1)]",
                          "WEBSITE_CONTENTSHARE": "[concat(parameters('Functions_App_Name'),'_files')]",
                          "WEBSITE_NODE_DEFAULT_VERSION": "6.5.0"
                      }
                  },
                  {
                      "apiVersion": "2015-08-01",
                      "name": "web",
                      "type": "config",
                      "dependsOn": [
                          "[resourceId('Microsoft.Web/Sites', parameters('Functions_App_Name'))]",
                          "[resourceId('Microsoft.Storage/storageAccounts', parameters('Storage_Account_Name'))]"
                      ],
                      "properties": {
                          "cors": {
                              "allowedOrigins": [
                                  "[concat('https://',parameters('Storage_Account_Name'),'.blob.core.windows.net')]"
                              ]
                          }
                      }
                  }
              ]
          }
      ]
  }
  </code></pre>