Looking to migrate NSF to PST file for moving from HCL Lotus Notes to Microsoft Outlook? Start with the manual route: export Notes data to CSV from Lotus Notes, then import the CSV into Outlook using Import/Export; this works for emails, contacts, and calendar, but can be slow and may lose formatting or attachments on large mailboxes. For smaller mailboxes, you can also export EML from Notes and drag-and-drop into Outlook folders, though it's time-consuming and best for limited items. If you need accuracy, speed, and folder integrity at scale, use a dedicated NSF to PST converter that supports batch export, preserves metadata, handles large NSF files, and lets you split oversized PSTs to avoid corruption. Before starting, ensure Lotus Notes and Outlook are installed, back up NSF files, check mailbox size, and plan mapping. Post-conversion, add the PST in Outlook (File > Open & Export > Open Outlook Data File), verify folders, search, and attachments, then reconfigure signatures and rules. For enterprises, consider direct NSF to Office 365/Exchange migration tools to skip intermediate PSTs. This balanced approach ensures data integrity, minimal downtime, and a clean transition to Outlook.