SYSessential OST to PST Converter is an efficient solution to securely convert Outlook OST files without any loss of data. Users can easily migrate OST files to PST format as well as to EML, MSG, PDF, HTML, MBOX, and NSF file formats. Users can convert either single or multiple OST files as per their requirement. The software retains the original formatting and metadata when migrating OST files. It offers the facility for restoring orphan and inaccessible OST files too. Large OST files can be efficiently migrated by the software along with high-speed performance. Emails, contacts, calendars, notes, journals, tasks, and events can be converted without altering the original structure. It provides the option to preview mailbox items prior to their migration through its preview feature. This software also offers a selective migration feature for migrating only selected folders and mailbox items. It comes with a very user-friendly interface. The migration process does not require the Outlook installation. Works with all Windows versions.