You can export orders in the three different ways:
Exported files are stored automatically either in local server to download later, or uploaded via FTP, or sent via email according to preset configuration. In all cases, you can customize the fields which are to be exported.
You can import the sales order to your current store or multiple stores from one instance. When you’ll import orders from CSV or XML files, it’ll create the necessary customers with billing / shipping addresses. There are different importing options, for example:
Before starting the Import process, it checks the existing sales orders, invoices, customers and related data and display the comparative results. So, you can review and fix if there is any problem in your files before starting the final importing.
It can import export from / to various file type i.e. xml, csv or multiline csv. It also support transfer order to third party software like ERP, accounting software or any other Magento installation.
Import Histories are logged and can viewable from admin. Log contains status of importing including how many import are success, how many failed and how many has error with error details so that you can decide or fixed error and import failed order again