arm_storageaccount_reference.json

{
    "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
      "azureStorageAccountResourceGroup": {
        "type": "string",
        "metadata": {
          "description": "Resource group of Azure Storage account to synchronize with."
        }
      },
      "azureStorageAccountName": {
        "type": "string",
        "metadata": {
          "description": "The name of the storage account to synchronise with."
        }
      }
    },
    "variables": {
      "azureStorageAccountID": "[resourceId(parameters('azureStorageAccountResourceGroup'), 'Microsoft.Storage/storageAccounts', parameters('azureStorageAccountName'))]"
    },
    "resources": [
    ],
    "outputs": {
      "storageAccountUri": {
        "type": "string",
        "value": "[reference(variables('azureStorageAccountID'), '2018-02-01').primaryEndpoints.blob]"
      }
    }
  }