OST to PST File - Version 3.7 OST to PST File tool to recover Offline Storage files (.OST) from Exchange Server, which is created by Microsoft Exchange Server like 4.0, 5.0, 5.5, 2000, 2003, 2007 and 2010. OST to PST Conversion software successfully runs on all platforms of Windows OS like Win 95, 98, 2000, XP, 2003, ME, Vista, Win7 and supports all Microsoft outlook 2010, 2007, 2003, 2000 and 98. OST File to PST File freeware recovers data from damaged, corrupt or inaccessible OST files and recovers data from password protected OST files too. User Evaluate Exchange OST to PST software with Demo Version free of cost, download from websites and try. After demonstration, user desire to purchase full version then buy at only $99.