Download the PassFixer OST to PST Converter software to convert Outlook OST file into PST. this tool is able to convert your Outlook OST file into PST and many different formats such as EML, Yahoo, Gmail, Office 365, ICS, vCard, HTML, MBOX, Zimbra, MBOX, and EMLX. You can easily convert multiple Outlook OST files at the same time with the bulk conversion option. Check the free demo Microsoft OST to PST Converter software version of this tool from the official website of PassFixer.
if you search any excellent software for ost to pst conversion try stella ost to pst conversion software to convert all ost mailbox items in to pst file. this software is convert all ost mailbox items like emails, contacts, calendars, task, notes and many other items in to office 365 account this software is convert all 32bit and 64bit ost file. this software is convert all ost mailbox items using some simple steps. For more info visit this link https://www.stelladatarecovery.com/ost-to-pst-converter.html