Stella convert ost to pst software is the one of the best ost converter software to convert all ost items in to pst file this software is convert all ost mailbox items in to office 365 account. This software is convert all ost mailbox items like emails items, contacts items, calendars items, task items, notes items in to pst file. this software is support all version 32bit and 64bit ost file. for more info visit this link https://www.stelladatarecovery.co m/email-migration/ost-mails-recovery-software.php