To export Outlook OST files to PST format, using eSoftTools OST to PST Converter software is one of the most effective solutions. This professional tool allows users to quickly and securely convert OST files to PST format without any data loss. It supports all versions of Outlook and accurately exports emails, contacts, calendars, notes, and attachments. This software can also handle orphaned, inaccessible, or encrypted OST files and preserves the folder structure during the conversion process. After exporting to PST, users can easily import the file into Outlook and seamlessly access their entire mailbox data.