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How to open .nsf files?
#1
Good question! An .nsf (Notes Storage Facility) file is basically the database file that IBM/HCL/Lotus Notes uses to store all its data – emails, calendars, contacts, etc.
So, the most direct way to open an .nsf file is to use the Lotus Notes email client. If you have it installed, you can just open the file from within the application.

But I'm guessing you're asking because you don't have Lotus Notes, right?
In that case, you can't "open" it in the traditional sense like you would a Word document. Instead, you need to extract the data from it and convert it into a more common format.

The best way I’ve found to do this is with a tool that can both read the file and convert it. I use the eSoftTools NSF to PST Converter. What’s cool about it is that it has a preview feature. So, before you even do the conversion, it acts like an "NSF file viewer," letting you click through all the folders and see the emails and other items inside.

From there, you can choose to export everything to a PST file to use in Outlook. It's the most practical way to "unlock" the data inside an NSF file when you don't have the original program.
Best of luck!

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How to open .nsf files? - by roggessteave2427 - 09-23-2025, 06:56 AM

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