If you are looking for a method to export OST files to CSV, then you can use the EmailProHelp OST to PST Conversion Tool. This utility allows you to convert OST files to a variety of formats, such as MBOX, PDF, EML, EMLX, and HTML. It can also directly transfer OST files to Office 365 and other email services. The tool supports simultaneous backup or migration of multiple files. Key features include a date filter, a duplicate email removal option, and a file preview. It works with every version of the Windows operating system.

Url: https://www.emailprohelp.com/ost-to-pst-conversion-tool.html