Mrthdrb

I have a module with which I create my attribute. I can get it and show it in the admin panel, but not when the data is recibed on checkout process.

This is my installer code:

 public function install(
 ModuleDataSetupInterface $setup,
 ModuleContextInterface $context
) {
 $customerSetup = $this->customerSetupFactory->create(['setup' => $setup]);

 $customerSetup->addAttribute('customer_address', 'dnicif', [
 'label' => 'DNI',
 'input' => 'text',
 'type' => 'varchar',
 'source' => '',
 'required' => true,
 'position' => 45,
 'visible' => true,
 'sort_order' => 45,
 'system' => false,
 'is_used_in_grid' => true,
 'is_visible_in_grid' => true,
 'is_filterable_in_grid' => true,
 'is_searchable_in_grid' => true,
 'backend' => ''
 ]);



 $attribute = $customerSetup->getEavConfig()->getAttribute('customer_address', 'dnicif')
 ->addData(['used_in_forms' => [
 'adminhtml_customer_address',
 'customer_address_edit',
 'customer_register_address'
 ]]);

 $attribute->save();


 $installer = $setup;

 $installer->getConnection()->addColumn(
 $installer->getTable('quote_address'),
 'dnicif',
 [
 'comment' => 'DNI',
 'type' => Table::TYPE_TEXT,
 'length' => 255
 ]
 );

 $installer->getConnection()->addColumn(
 $installer->getTable('sales_order_address'),
 'dnicif',
 [
 'comment' => 'DNI',
 'type' => Table::TYPE_TEXT,
 'length' => 255
 ]
 );

 /** @var QuoteSetup $quoteInstaller */
 $quoteInstaller = $this->quoteSetupFactory->create(
 ['resourceName' => 'quote_setup', 'setup' => $setup]
 );

 /** @var SalesSetup $salesInstaller */
 $salesInstaller = $this->salesSetupFactory->create(
 ['resourceName' => 'sales_setup', 'setup' => $setup]
 );

 $quoteInstaller->addAttribute(
 'quote',
 'dnicif',
 ['type' => Table::TYPE_TEXT, 'length' => '255', 'nullable' => true]
 );

 $salesInstaller->addAttribute(
 'order',
 'dnicif',
 ['type' => Table::TYPE_TEXT, 'length' => '255', 'nullable' => true, 'grid' => true]
 );

I need recibe this data on email confirmation and/or the order data on admin panel.

Im using magento 2.1

¿Any ideas?

Thank you very much guys.