Before using the BAI Export for the first time, you will need to configure it. Go to Tools>Options and click on Export in the tree view on left of the options screen.
Select PST BAI Export from the Export Format drop down box and then click the 'Configure' button. You will see the following configuration dialog box.

Enter the appropriate information and click 'OK' to save your settings.
First retrieve the items that you would like to export by doing a find. For instance do a find for all items with a process date of the current day, to export the days work.
Once you have the items in the grid that you would like to export then, Select File -> Export-> Export PST BAI Export from the menu.
If you set the PST BAI export as the default export then you can also get the export in the following ways:
Click the Export button on the toolbar
Click the Export button in the lower right corner of the main screen
Before exporting EZ-Scan will check the items currently in the grid to see if any of the items need to be verified. If any of the items do need to be verified, you will be given the opportunity to verify them before exporting. You will be prompted with this dialog box.

If you choose 'Yes', you will be taken to the Verify screen to correct the data. You will then automatically returned to the export when verification is done. If you click 'No', you will proceed to the export.
This export will export the data in the grid in the BAI format. Browse for the Export path using the 'Browse' button to the left of the 'Export Path' text box. Enter a descriptive name for the file to be exported and click 'OK' to start the export.

When the export is complete you get a confirmation message.
