Syncing HCL Notes Calendar with MS Outlook

Bob Maria
Bob Maria linkedin | Updated On - January 18, 2023 |

Read time: 3 minutes

Both Lotus Notes and Outlook are widely used email clients by email users and organizations. Both email clients provide facilities like email, calendars, address book, tasks, and databases. However, there are two major differences between Lotus Notes and Outlook. All the files in Lotus Notes are saved in NSF format, unlike the Outlook application, where the files are saved in PST format.

Nowadays, most business professionals are working on syncing Lotus Notes Calendar with Outlook. This happens if any organization is planning to shift to Microsoft Outlook, they need to import calendar entries and other mailboxes from Lotus Notes to Outlook. Below are a few common reasons to sync Lotus Notes Calendar with Outlook:

In this blog, we shall discuss two methods to sync Lotus Notes Calendar with Outlook. The first method is the manual method, where we will first convert and save the files in ICS format. In the second method, we use professional tools to migrate from Lotus Notes to Outlook.

Manual approach to sync Lotus Notes Calendar with Outlook

Phase 1- Convert Lotus Notes Calendar into ICS Format

  • Open the Lotus Notes application on your system and select Calendar.
  • You can view the calendar entries by clicking on the View option.
  • Select the File tab and from the drop-down menu, select Export.
  • The Export dialogue will appear. Add a name to the converted (NSF to ICS) File under the box, Filename.
  • Under the Save As option, select the file type as Calendar File (.ics). Click on the Export option.
  • iCal Export dialogue box will appear. Select the radio button, “All Documents.” Click OK.
Phase 2- Import ICS file to MS Outlook
  • Launch Microsoft Outlook and click File from the menu bar.
  • From the left panel, click Export/Import from the Open option.
  • Select the option, ‘Import an iCalendar,’ and then click Next.
  • Browse and select the iCS that you created in the first stage.
  • Select Calendar as the destination for iCS file.
  • Select the option Import, and your desired iCS calendar file will be accessible in Outlook.
Professional approach to sync Lotus Notes Calendar with Outlook

The second approach to syncing Lotus Notes Calendar with Outlook is using professional software or a third-party tool that guarantees quick and efficient conversion. One such professional tool is Kernel for Lotus Notes to Outlook Converter. This tool exports data from Lotus Notes NSF files to Outlook PST files. The data can be filtered as per your requirement before migration. Apart from this, you can view the converted files before saving them. This professional tool comes with user-friendly features that do not demand much technical knowledge. You can also split the converted large-size NSF files into small-size PST files without losing data integrity.


Calendar contains all the useful information and assigned tasks that require regular checks that cannot be ignored. There are no such methods where you can share Lotus Notes Calendar entries directly to Outlook. In this blog, we discussed both manual as well as professional methods to transfer Lotus Notes calendar entries to Outlook PST format. The manual method is time-consuming and does not guarantee complete results. Moreover, this method works only if the data is small. On the contrary, a professional tool Kernel NSF to PST Converter, works efficiently in no time. You can initially use the trial version to see the perfect results. Later you can purchase the NSF to PST Converter full version.