Stella ost to pst recovery software is the best ost file recovery software to recover all ost file items 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 file items using some simple steps this software is support all version 32bit and 64bit ost file. For more info visit this link https://www.stelladatarecovery.com/ost-to-pst-converter.html