Stella ost Recovery Software is an excellent tool to recover all ost mailboxes in to pst. Stella ost recover software will retrieve all ost mailbox items to your office 365 email account. This software recovers all ost mailbox items to an office 365 account. Stella ost Recovery Software recovers all 32-bit and 64-bit versions of ost mail items in to a file called pst. This ost restoration software retrieves all deleted items from the ost file.
This link provides more information.
MailsDaddy is an advanced OST to PST converter program that helps users to export OST files with a reliable method. The tool has the ability to transfer OST files into different formats such as PST, EML, EMLX, MSG, HTML, and MBOX. This tool will perfectly able to recover the password-protected or inaccessible OST files by fixing and repairing them. Moreover, users don’t need to install Exchange Server or any other tool to follow OST to PST conversion process.
To know more:- https://www.mailsdaddy.com/ost-to-pst-converter/