If you want to convert MBOX to NSF format, use the
SysInspire MBOX Converter tool, which can convert MBOX to a variety of formats like EML, EMLX, HTML, MSG, GMAIL, NSF, and more. It's easy to use and understand for the user thanks to these advanced features and a simple GUI interface. This incredible tool ensures that all of the files are correctly converted. The application provides users with a precise and error-free conversion result. Furthermore, you have complete control over the size and number of MBOX files you convert.
For more info click here- Import mbox file to office 365