Microsoft OST Converter - Version 3.3 Microsoft OST Converter Software is the best conversion tool for Microsoft Exchange Offline Storage (.ost). It is beneficial for you because you can easily perform tasks being in the offline mode. When Microsoft Exchange Server gets crashed due to some unpredicted corruption and you want to overcome your loosed data situation, than use our Microsoft OST Converter Software gave the best solution to convert Microsoft OST to PST. Microsoft OST Converter Tool is effective email conversion tool to convert emails, contacts, calendar, tasks, notes, appointment and journal etc. Software uses advance algorithm to scan the orphaned or inaccessible OST file and recover your email messages and other items as much as possible, so to minimize the data lose. It can successfully recovers and convert emails from inaccessible OST files created using Microsoft Exchange 5.0, 5.5, 2000, 2003, 2007 and 2010 and gives access to the email data stored in them. Try the Demo Version of Microsoft OST Converter Tool Free of cost, it will show you the process of recover and convert OST file to PST files