Free Tool for OST to PST - Version 4.0 SysTools for OST to PST Converter is famous email recovery solution awarded by IT specialist and Outlook professional engineer. OST to PST Converter is free email recovery software used on off-line Exchange Server to restore emails from unreadable OST files. It is great email recovery software which brings back deleted or corrupt Outlook emails from OST files. Using OST to PST Conversion on Exchange Server downtime and quickly repair unusable OST files to convert OST to PST files including email items like Emails, Messages, Contact, Calendar, Notes, Tasks, Journals, Draft, Appointments etc. It is right email converter application for Outlook client use on off-line mode to convert OST to PST files and accomplish email from ineffectual OST files. OST to PST Conversion progression is actual way to get email after processing corrupt OST files. OST to PST Email Converter software allows recovery of selected folders and displays complete recipient list after recovery email from OST files. It performs advanced scanning process to recover email from unreadable OST files.