To import NSF files to an Office 365 account, follow these steps:
Export NSF to PST: Use IBM Lotus Notes to export NSF files to PST format. You can do this through the File menu by selecting Export.
Prepare Office 365: Ensure your Office 365 account is set up and accessible.
Use Outlook: Open Outlook and add your Office 365 account.
Import PST: Go to File > Open & Export > Import/Export, then select Import from another program or file and choose your PST file to complete the import process.