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I'll say that switching from Lotus Notes to Outlook, which allows exporting multiple NSF files in several file formats, is the simplest approach to convert NSF to PST. This utility keeps all mailbox contents, including emails, tasks, draughts, calendars, attachments, and contacts, without losing a single byte of internal data. The Outlook tool is required for migrating using the efficient tool. It keeps all properties and the folder during the Lotus Notes domain migration to PST.

Know more info- https://www.vsoftware.org/nsf-to-pst-converter.html