OST Files to Outlook Converter - Version 3.5 OST Files to Outlook Converter software easily convert OST email to PST when MS Exchange Server goes down. It is very critical situation whenever OST files got corrupted or becomes inaccessible due to the email client machine MS Exchange goes down. The main reason behind MS Exchange breakdown is virus infection, software malfunction, power surges and unsuccessful installation of the MS Exchange etc. SysTools Convert OST to PST provides you the ultimate solution which is specially designed to convert all OST mails of MS Exchange to PST format of MS Outlook. SysTools Convert OST to PST software efficiently repairs inaccessible or corrupt OST files and convert that into working PST file. OST Files to Outlook Converter successfully Convert OST File to PST File created using MS Exchange 5.0, 5.5, 2000, 2003 and 2007. Convert OST Files to PST tool can effectively recover exchange emails or messages that have been deleted from Deleted Items folder. This Convert OST to PST software performs very fast and converts OST files to PST, MSG and EML format without having any issue. OST Files to Outlook