Download exchange ost to pst converter software to convert all exchange ost mailbox items in to pst file this software is convert all corrupted and unmounted exchange ost file data like emails, contacts, calendars, tasks, notes and many other items in to pst file this software is support all version 32bit and 64bit ost file this work with windows 10 and windows 11 32bit and 64bit. For more info visit this link https://www.stelladatarecovery.com/email-migration/ost-to-office-365.php