Stella ost to pst converter software is the very useful software to convert all ost mailbox items in to pst file. this software converts all ost items into office 365 accounts and does not corrupt original ost file data. This software converts all ost mailbox deleted items data in to pst file and support all version 32bit and 64bit ost file. this software converts all ost mailbox items into eml file, emlx file, msg file, mbox file and pst file.
For more info visit this link.
https://www.stelladatarecovery.com/email-migration/ost-mails-recovery-software.php