The best recovery process of OST data by Softaken Exchange OST to PST Recovery tool which is the best tool that allows users to recover the OST data from damaged and corrupted OST file into new PST file with emails, task, contacts, attachment, notes, and calendar. The software shows the preview of recovered items of OST mailbox quickly. You can restore OST file items to several required file formats such as PST, EML, EMLX, MSG, MBOX, vCal, vCard and Office 365.