How to Open NSF File in Outlook- A Step by Step Guide

Do you want to know How to Open NSF File in Outlook and unable to find any solution? Then go through this blog to know the best solution to convert NSF to PST file format.

The organizations use two major email clients that are Microsoft Outlook and IBM Lotus Notes. However, there are many situations where users have to change their email client from Lotus Notes to Outlook. But accessing the Lotus Notes in Outlook is not possible directly. They both are database file formats that are not compatible with each other. So users need some easy solutions to export NSF files to Outlook.

Now, let’s go through the need and the procedure to convert Lotus Notes to Outlook.

Why Need to Convert NSF to PST?

The main reason to export IBM Lotus Notes to PST is the exposure of the NSF file corruption. The NSF files are much more prone to corruption. This corruption can occur due to many reasons like abrupt system shutdown, header corruption, virus attack, and many others. Thus there is a need to convert Lotus Notes NSF to Outlook PST.

Learn How to Open NSF File in Outlook is becoming a common task. It’s because of the management issue, cost-effectiveness, and changing business inevitably. There are also a few reasons behind the conversion:

  • MS Outlook allows offline access to the mailbox with the offline folders.
  • Outlook provides better security and data management features than Lotus Notes.
  • The MS Outlook is a more user-friendly utility compared to Lotus Notes.
  • It requires fewer maintenance costs.
  • The data sharing process is easy in Outlook.
  • MS Outlook offers to configure multiple accounts simultaneously.

How to Open NSF File in Outlook Manually

This manual approach is the best free NSF to PST conversion procedure to export Lotus Notes to PST. It’s better to always keep a backup copy of all original NSF data files before convert NSF to PST manually. It is so that there are chances of file deletion in Outlook during the conversion. The manual approach for How to Open NSF File in Outlook goes through two stages:

  1. Export NSF File to CSV 
  2. Import the Exported CSV Files in Outlook

1. Export NSF to CSV

To convert NSF file to PST freeware, follow the mentioned steps:

  • Firstly, launch Lotus Notes utility.
  • Now, click on File>>Open>>Lotus Notes application.
  • Then, in the Open Application wizard, browse for the required NSF file. Click Open.
  • From the File menu, hit the Export button.
  • Now, in the Export dialog box, type the file name, location, and file type.
  • Select the Comma Separated Value file format for saving the file.
  • A new CSV Export dialog box will appear. Here, choose the required option and click OK.
  • The exported file will save as a CSV file format in the provided location.

Now follow the next step to complete the procedure for How to Open NSF File in Outlook.

2. Import CSV File into Outlook

Now, in this step, we have to import the intermediate CSV file into Outlook by following the given below steps:

  • Open the MS Outlook utility.
  • Now, click the File tab and choose Open and Export>>Import/Export.
  • A new Import and Export dialog box will appear. Now, pick the option –  Import from another program or file. Click on Next.
  • Then, from the file type, choose the Comma Separated Values and click on Next.
  • Now, click on Browse and select a location for CSV. Here, you can choose the options as per requirements.
  • Select the Outlook folder to save the exported file and click on Next.
  • From here, select the given checkbox of Import a file wizard and click on Finish. You can also change the location or can map the custom fields by choosing the same name options.

Finally, the CSV files are imported successfully to MS Outlook. Thus after following the above method’s steps, users can easily convert Lotus Notes NSF to Outlook PST.

Automated Method to Convert NSF to PST Without Lotus Notes

If the manual approach fails, users can take help from a trusted third-party tool. NSF to PST Converter is the perfect approach to export NSF files to PST. This  NSF Converter is an advanced utility that exports your NSF files without any data loss. The tool is capable of executing the batch conversion of NSF files to PST. It comes with a user-friendly GUI that makes it easy to handle.

Now, check the working of the NSF to PST Converter Tool.

  1. Download & Launch the MSOutlookhelp NSF Converter.
  2. Now, click on Add files to choose NSF files from the system.
  3. You can select single or multiple NSF files and click Open to Proceed.
  4. Now, choose the file and also can preview them.
  5. The scanning process will begin. After completion, click on the OK.
  6. Then, click on the Export option to convert the NSF file to PST.
  7. Now, press the browse button to save the new PST files and hit on OK.
  8. The NSF conversion procedure started on your system. 
  9. Hence, your converted NSF file, saved in the provided location.


The above article will explain to you the various methods for How to Open NSF File in Outlook. The first method is manual and free. But it includes some serious risk of data loss. Thus, users have to think twice before executing. On the other hand, the best free NSF to PST Converter Tool is a completely secure way. Now, it all depends upon the users which method they choose to convert NSF to PST. You can also export emails from Outlook by using a professional Outlook solution. Thank you for reading this blog.

About The Author:

Mithilesh Tata is an Email Migration and Data Recovery Expert. He has a keen interest in Technology & Entrepreneurship. Also, he loves cricket, music, and books.


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