Step by Step Guide to Convert Lotus Notes NSF to Outlook PST File

Last Updated on December 31, 2020 by Henry Bray

MS Outlook and IBM Lotus Notes are some of the most widely used and most anticipated email clients. These email clients have ruled the market for a while now. IBM Lotus Notes have been used widely since 1989, and along with being email client, it offers a lot of features like calendaring, scheduling, and programming.

On the other side, MS Outlook offers all the feature bundles to its users in an easy to use and simple UI. But IBM Lotus Notes is not that easy to use, it is still a great encryption on the edge. Various users and organizations naturally started migrating and moving from Lotus Notes to Outlook (NSF to PST).

Try Regain NSF to Office 365 Migrator tool to Import Lotus Notes Mailbox data to Office 365 account or Exchange Server. Download Here

Why to Convert NSF to PST?

IBM Lotus Notes has been widely used as an email client for several organizations for a long time. It offers unmatched security features with encryption. Since it has stopped support for earlier versions, it is not easy to maintain this email client. To reduce cost because of high maintenance requirements and to improve productivity, a lot of organizations are moving to another email client.

Problems with IBM Lotus Notes

  • As support for IBM Lotus Notes has been ended in earlier versions, a lot of organizations and users are moving to other email clients to reduce maintenance costs.
  • Despite being famous for great security, IBM Lotus Notes has lost its accessibility to a great extent. It doesn’t allow any plug-in support or synchronization with third-party email clients.
  • IBM Lotus Notes has a lot of learning curve. Only users with great technical knowledge can use it. So, beginners don’t have to use this client. So, IBM Lotus Notes is much useless.
  • When it comes to support, IBM Lotus Notes doesn’t support any tablet or smartphone. So, you cannot access this client remotely.
  • In addition, it limits its users to access only one account at a time. You have to log out of existing account to access another account with details.

Why Switch to MS Outlook?

  • Main reason people switch to MS Outlook is low cost of maintenance. Outlook comes under MS Office suite. So, there is no need to buy it individually.
  • It provides unmatched accessibility. You can open it from Mac, PC and even mobile devices.
  • It supports a lot of plug-ins. You can use multiple accounts and connect with several apps at the same time, such as OneDrive, Skype, Twitter, and LinkedIn.
  • As compared to IBM Lotus Notes, MS Outlook is very user-friendly as it comes with automatic email organization for filtering and sorting, and Search Feature.
  • You can use and access various accounts on Outlook at the same time without entering credentials every time.
  • MS Outlook has been designed by considering various needs of beginners and vast expert demographics.

MS Outlook is among the widely used email clients. For IBM Lotus Notes to Outlook migration, you need to perform NSF to PST file conversion. Here, we will discuss two different methods in this article to migrate Lotus Notes to MS Outlook.

Method 1 – NSF to PST Conversion Manually

As you know, you cannot access NSF file using MS Outlook. So, we will first discuss how to do it manually. Even though it doesn’t assure complete migration of NSF to PST in original format, you can still go with this option if you want to access only a handful of data.

This manual method needs you to extract data from NSF and save the data in PST format that you can also access through MS Outlook and import the same to Outlook client. In this method, this file in which data is saved would be CSV. There are two steps in manual process –

Notes: Please don’t forget to backup your NSF file before following the steps mentioned below.

  • Exporting data from Lotus Notes and saving in another file.
  • Importing data from separate file in MS Outlook.

step 1: Exporting data from Lotus Notes and saving in another file

1.  Open IBM Lotus Notes email client.

nsf to pst converter software

2.  Select NSF file which you have to export.

NSF to PST Converter

3.  Once you select and open file on Lotus Notes, click File on the menu bar and click Export on the drop down menu.

NSF to PST Migration tool

4.  Enter file name, location of file, and file type as CSV on Export Wizard.

Export NSF to Outlook PST file

5.  It will show up CSV Export dialog box, here select important options and click the OK button.

NSF to PST file conversion tool

step 2: Importing data from separate file in MS Outlook

1.  Open MS Outlook email client

Lotus NOtes to Outlook PST Migration

2.   Click on File and click Open and Import from drop down menu

Lotus Notes to Outlook PST Migration - Free Guide

3.   Once you click Import, it will show up Import and Export Wizard and it will show up different options. Select “Import from another file or program” and “Next”.

Manual NSF to PST File Converter tool

4.   Choose file type as “Comma Separated Values” and click Next.

Free helping guide for nsf to pst converter

5.   Click Browse and find CSV file created with Export Wizard in Lotus Notes. Select from the options provided on whether you want to create duplicate entries or not and click Next.

nsf to pst converter manually

6.   Now choose Outlook folder where you want to import data and click Finish.

step by step guide to convert nsf to pst file

7.   Data saved in CSV file will be imported in MS Outlook.

Sucessfully save nsf to pst converter manually

Now, you can easily access the NSF files data in Outlook. When converting NSF to PST, the manual process can cause many problems. So, let us briefly see what are various problems that arise from this manual solution.

Problems in Manual Conversion
  • Manual NSF to PST conversion allows you to import email header and not the whole body content
  • It is a very tedious process and is complex enough and is surely not good for basic users.
  • Since manual process takes a lot of time, it is not good to migrate the whole databases in those situations.
  • Migrating NSF to PST, with manual process is very difficult and it should be done with care as incorrect technique might cause corruption of files.
  • CSV format is used as mediator by manual conversation. Due to this reason, files are imported in raw format. It might not transfer data in original formatting or to maintain folders and files hierarchy.
  • Manual technique just allows single NSF file for conversion at a time which can make whole process boring and stressful.
  • You cannot perform selective data transfer in this process. You need to transfer whole file.

Method 2 – By Using Regain NSF to PST Converter

You need a Regain NSF to PST Converter to migrate from IBM Lotus Notes to MS Outlook. But data is stored in IBM Notes in NSF format and MS Outlook uses PST format in doing the same. So, you can use Regain NSF to PST converter to convert NSF file to Outlook PST format so you can convert database of whole NSF into PST format smoothly and easily.

The tool uses effective algorithm for NSF to PST file conversion even though NSF file is encrypted. Regain NSF to PST converter doesn’t need any specific technical skill to use and it is best for all businesses. You can download this software from here: 

Here’s the step-by step process for NSF to PST file conversion –

1.  Open Regain NSF to PST converter.

Regain NSF to PST Converter - Home Screen

2.  Click on Add file option to choose NSF file to perform conversion.

Select Lotus Notes NSF file for Conversion

3.  Now, the scanning process start to retrieve Lotus Notes Mailboxes.

Scanning process for Lotus Notes NSF file

4.  After Complete Scanning, it will show the preview of Lotus Notes Mailboxes before Saving to another format.

Show preview of all convertible Lotus notes mailboxes

5. select the desired file format from the ‘Save option’ to Save resultant NSF file.

Support multiple format to save nsf file to pst, mbox, eml, emlx and msg file format

6. Finally you will receive a message as shown in the screenshot below. it means your NSF files are successfully converted into your desired file format.

Sucessfully save nsf file to pst file

You can check out all of your converted NSF file data on your system. The software has successfully saved all converted NSF data to the destination you specified in the software during conversion. You can upload this PST file on any version of MS Outlook to access all the data stored in it.


When it comes to migrate the whole databases, it is not wise to use manual method. It makes the whole process very difficult and complex. Regain NSF to PST converter is a complete tool which caters to all specifications of NSF to PST conversion. It keeps the NSF file data intact during the conversion of NSF to PST file format. It is the best tool to perform bulk file conversion and convert data like calendar, emails, journals, contacts, etc. with precision. If you stuck into any difficulty completing the above steps, please contact us directly. We will help you perform the entire conversion. Thank you for taking the time to read this article.

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