Never do anything directly on a live store. First setup and test on a development domain (i.e. “dev.url.com”).
Make sure that you set your Magento application to the developer mode.
1.a) Temporarily disable Magento cache
To avoid any possible issues with the installation, we recommend to disable Magento Cache before starting the installation. After installing, you can enable the Cache again. This article describes how to enable or disable Magento 2 Cache types.
1.b) Enable Order Export/Import Extension:
Using your favorite FTP client, upload all files and folders to the root folder of your Magento installation
1.c) Enable Order Export/Import Extension:
Enable Acx_OrdersExportImport module. For how to enable magento 2 module follow this link.
After installing successfully, you can view the Order Export/Import menu on System menu in Backend Admin. And then, you need to configure few settings to execute the Export and Import operations.
2.a) Profiles for Export:
You need to create a Profile to export orders/invoices from Magento 2 instance. To set a new Profile for Export, you need to open System (at left menu bar in backend) -> Profiles For Export (Under Order Export/Import) page and click on “Add New Profile” button.
You can set different configures for exporting in each profile.
2.a.i) Profile Title: Give a name to new Profile.
2.a.ii) Data Format: Settings for exported file format either XML or CSV file.
2.a.iii) File Information: Settings for storing the exported file either on Local server, or FTP.
If you select ‘Email’ type you will show that input form. It mail the exported file in listed mail.
If you will select FTP you have to provide path name with FTP details
2.a.iv) Automatic export settings: You can set export type either it is exported by manual or cron job automatically.
2.a.v) Order Entities: This include all Order entity. You have also select according to your requirement like select tracking number only for exporting tracking number.
2.b) Export Order:
After creating a successful profile, you can export all order in order grid table or go to System (at left menu bar in backend) -> Export Order (Under Order Export/Import). From order list panel export your order by selecting your desired profile.
2.c) Exported Files
You can download the exported file which stored in local server, you can see the list of exported files from System (at left menu bar in backend) -> Exported Files (Under Order Export/Import)
2.d) Import Order
You can import order which was export from another vendor. now you can go “System->Acx Import Order” from Admin Panel. You can configure Import order.