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