Hi,
I use Lotus Notes. When I open .nsf file, Lotus Notes will show a warning message "Unknown error trying to lock file."
Has anyone else seen this? Is there an alternative to Lotus Notes?
You might be able to use that to open the NSF file(s) to export the email into something readable by Outlook. Also using https://www.viewertool.com/nsfviewer.html, you can easily open NSF files without changing the attributes or formatting of original data.