The best solution depends on scale and compliance needs. For small, one-off migrations, export via Lotus Notes to CSV/ICS/VCF and import into Outlook, or use IMAP staging; it’s free but slow and error prone. For reliable, full fidelity moves (mail, calendar, contacts, hierarchy, HTML, inline images), use a dedicated converter with batch support, item filters, preview, and PST splitting to avoid oversized files. Reputable tools highlight features like bulk NSF→PST, preservation of structure, resume during interruptions, and trial limits (e.g., 25–50 items per folder) to validate results before purchase. Evaluate on a sample NSF set, verify counts, MIME, and calendar integrity, then run in batches with logs.
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