WholeClear OST to NSF Converter Software is safe and secure solution for converting large OST files to NSF format without any hassle. It quickly and consistently converts OST files into NSF format. It works with every version of Lotus Notes and Outlook. All users can access the software due to its user-friendly interface. Windows 11, 10, 8, 7, Vista, and XP are all compatible with it. Users can transfer emails, contacts, calendars, attachments, tasks, and notes from Outlook OST mailboxes to IBM Lotus Notes without losing any data.