The way through which one can export NSF to PST file without making any changes in the file order and the internal data is by using a robotic approach. So simply try a tool like eSoftTools Lotus Notes to Outlook Converter Software. The user has to choose any component of the mailbox. The mailbox may contain stuff like emails, notes, contacts, calendars, and many others. The user can restore deleted and corrupted email as well. Just open the tool and choose the file and then take a look at all the components and choose whichever is needed. Then, select PST as the file type after clicking on the convert option. A trial is also available for all users.
Export more ways to convert NSF to PST here.