Outlook OST PST Software - Version 3.01 Exchange OST file are offline storage file which makes it possible to work into offline mode. This software contains entire information like emails, contacts, calendar, journal, task etc. But when corruption occurs into Exchange server then you lost your entire offline data. In this situation you have to try Outlook OST PST software which can easily recover damage OST file as yet convert into healthy PST file format. This Outlook OST PST software is supportive with entire versions of Exchange server & MS Outlook. You can also free to download demo version of software which is free to convert 5 OST to PST files free. To convert complete OST file into Outlook PST format, you have to buy full version. Full version of Outlook OST PST software is available at only $99.