Stellar Converter for NSF – NSF to PST, Notes Migration, Email Export

What is included in Stellar Converter for NSF?

NSF to PST – Converts HCL/Lotus Notes mailboxes into Outlook PST files.
Multiple formats – Also saves mailboxes as MSG, EML, RTF, PDF, HTML.
Preview & filter – Previews items and filters emails by date range.
Find NSF files – Locates NSF files across a drive automatically.
Core Capacity – Converts mails, contacts, calendars, journals and to-do lists.
Important – Microsoft 365 export and batch conversion need the Technician edition.

What are the main benefits of Stellar Converter for NSF?

Stellar Converter for NSF is a Windows tool that moves IBM/HCL Notes (NSF) mailboxes into Outlook-ready PST files. It is built for one-way Notes-to-Outlook and Notes-to-Microsoft 365 migrations, not for ongoing mail management.

No data loss – Keeps attachments, folder structure and formatting intact.
Preview before saving – Pick only the folders you actually need.
Direct 365 migration – Exports Notes mailboxes straight to Microsoft 365.
Batch conversion – Processes many NSF files in one run.
Large mailbox handling – Splits oversized PST output by size or date.
One-way only – It does not convert PST back to NSF.

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What does Stellar Converter for NSF do?

Stellar Converter for NSF converts IBM/HCL Notes (Lotus Notes) NSF mailbox files into Outlook PST files. It scans the NSF mailbox and lets you preview emails, contacts, calendars, journals and to-do lists before exporting them. Besides PST, the same items can be saved as MSG, EML, RTF, PDF or HTML for selective use. The typical scenario is a one-time migration when a company leaves Notes/Domino for Outlook or Microsoft 365 but still needs old mail accessible without running the Notes client.

What is the difference between the Corporate and Technician editions?

The split is scale and migration targets. The Corporate edition installs on one Windows machine and converts up to 50 or 100 mailboxes, while the Technician edition installs on up to three machines in one location and converts unlimited mailboxes. Only the Technician edition adds batch conversion of multiple NSF files, direct export to Microsoft 365, export to an existing Outlook profile, and splitting of large PST output by size or date. For a handful of NSF files on a single PC the Corporate edition is enough; for bulk IT migrations or cloud moves the Technician edition is the required tier.

Does it export Notes mailboxes directly to Microsoft 365?

Direct export to Microsoft 365 is available only in the Technician edition, not in the Corporate edition. The Technician version sends converted Notes mailboxes straight to a Microsoft 365 account or appends them to an existing Outlook profile, which removes the manual PST-import step afterwards. The Corporate edition stops at PST and the other file formats, so a cloud move would mean importing the PST into the Microsoft 365 mailbox yourself. Confirm your destination before buying, because this single difference is the most common reason buyers pick the wrong tier.

Which mailbox items and file formats does it support?

It converts standard Notes mailbox objects: emails with attachments, contacts, calendar entries, journals, to-do lists and discussion notes. Converted data can be saved as PST or, for selective use, as MSG, EML, RTF, PDF or HTML. A date-range filter includes or excludes messages so you can migrate only the mail that matters, and the free preview shows every folder before you commit. This makes it practical for partial archive migrations, not only whole-mailbox transfers.

What should users check before choosing Stellar Converter for NSF?

Check three points first: it is a one-way tool that does not convert PST back to NSF, your mailbox count and cloud needs decide between Corporate and Technician, and the converter supports HCL/Lotus Notes version 6.0 and later. If you expect batch processing or Microsoft 365 export, only the Technician edition delivers them. The free download converts up to 10 items per folder, so you can test scan accuracy on your own NSF files before paying. Matching the edition to the migration scope avoids buying a Corporate license and then hitting the mailbox or feature ceiling mid-project.

Frequently asked questions about Stellar Converter for NSF

Is there a Mac version of Stellar Converter for NSF?

No. Stellar Converter for NSF runs on 64-bit Windows only, with support for Windows 11, 10, 8.1 and 8. There is no macOS build, so a Mac-based migration would need a Windows machine or virtual machine to run the conversion.

Do I need Outlook installed to use the converted file?

Yes. Microsoft Outlook should be installed on the same Windows PC so the resulting PST can be created, opened and imported. The Technician edition's direct Microsoft 365 and Outlook-profile export also rely on a working Outlook setup on that machine.

Can I test the software before buying?

Yes. The free version scans the NSF file and previews all mail items, and it lets you save up to 10 items per folder. This is enough to confirm that your specific NSF files are readable and that the folder structure converts correctly before you decide on an edition.