stella offline ost to pst full version converter software is the powerful software to convert all ost mailbox items in to pst file this software is convert all corrupted and unmounted ost mailbox items in to office 365 account this software is convert all ost file item like emails, contacts, calendars, task, notes an many other items in to pst file this software is support all version 32bit and 64bit ost file this software is convert all ost file data using some simple steps. For more info visit this link https://www.stelladatarecovery.com/email-migration/ost-to-office-365.php