If your NSF file gets inaccessible and orphan so you can use ATS NSF to PST Converter software which has lots of facilities for the conversion purpose. It is very trustworthy so you can trust on this for converting the data of NSF mailbox along with the properties of metadata such as To, Cc, Bcc, From, Date, Time, Subject and Object.
This tool has the auto scanning process which automatically scans all the errors and removes them instantly. It has multiple formats for saving the resultant data after the conversion. The file formats are PST, EML, MSG, vCal, vCard, HTML, CSV, EMLX and MBOX. It supports cloud-based application Office365 & live Exchange Server for preserving the PST file for future use.
You can see the preview of recovered mailbox before finishing the conversion of NSF to PST. For the conversion, there are no size limitations so you can export any sized file. To convert 25 emails per folder free of cost you can download its free demo version.
