Here is the method to restore a corrupt OST file into an ELM file. First of all you have to install the SysInspire OST to PST Converter tool. It can convert your OST file to PST and 15+ other formats like PST, Office 365, EML, EMLX, HTML, MSG, CSV, VCF, Yahoo Mail, IMAP Account, Gmail, Zimbra Desktop and many more. This software also gives you the best features like email filtration and conversion. And also you can provide technical support through the emails and live chats.