Exporting Outlook OST to PST is even easier with
eSoftTools OST to PST Converter Software. It's feature-rich and has been used by many users, yielding excellent results. I've used this software myself, converting my OST file to PST in just a few steps. It's not difficult to use at all. In addition to PST files, you can also convert emails, contacts, calendars, notes, and other mailboxes to other file formats like EML, MSG, EMLX, MBOX, HTML, MHTML, and more. Furthermore, you can easily convert up to 25 emails from a single Outlook OST file to PST using this software.
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