If the holder wants to use a CSV file in another location, but will need to change all values. Alternatively, you can leave everything as it was. After that you need to do is sort of user names, mailbox address and the number of messages.
If you open a CSV file via Excel, then click on the button "Enable" so the program can read the file. Once you're done, be sure to click on the button "Export". The plugin will automatically begin to export all the data WordPress user, then the CSV file will be saved on the server.
To save the file on your computer, finished, click "Download". After this procedure, you can successfully import the file.