stella ost to pst converter software is the best software to convert all ost mailbox items in to pst file this software is convert all corrupted and unmounted ost mailbox items like emails, contacts, calendars, task, notes and many other items in to pst file. this software is convert all ost file using some simple steps this software is convert all 32bit and 64bit ost file. for more info visit this link https://www.stelladatarecovery.com/ost-to-pst-recovery.html