How to Compact OST File - Version 3.3 How to Compact OST File? Use OST Recovery software to recovers corrupt Offline Storage files form Exchange Server database and converts OST file to PST files. Basically this software design with high technique and algorithms to easily scan corrupt Offline Storage files (.OST) and convert it PST, EML and MSG File format. This software quickly runs on all versions (Windows 7/Windows Vista / 2003 / 2000 / XP) of Windows OS as well as supports all versions of MS Outlook like 2010, 2007, 2003, 2002, 2000, 98 and 97. This software supports all OST files created by Microsoft Exchange Server 2010, 2007, 2003, 2000, 5.5 and 5.0 and convert OST files to PST files easily. User can easily purchase online this software just at $99. Get more info visit-: http://www.ostfile.co.uk/