Lotus Notes archives emails in the NSF format, a format that Microsoft Outlook doesn't understand. So, if you want to see those older emails in Outlook, you need to change them into a format Outlook can read, which is PST. You could try doing this manually, by saving each email as a separate file and then importing them. But honestly, that's a messy way to do it. You often lose attachments, the folders get all jumbled, and the emails don't look right. It's just not a reliable way to keep your old emails safe and organized.
There's a much better way: using software like eSoftTools NSF to PST Converter. This tool is designed to take your NSF archive files and turn them directly into PST files, keeping everything intact. It handles all your emails, attachments, and folders, making sure nothing gets lost or messed up. Plus, it works with all versions of Outlook, so no matter what version you're using, you can easily open your old Lotus Notes emails. It's so simple to use that anyone can do it, even if you're not a tech expert.