Want to convert OST to Outlook data file? Yes, then use OST Export software to instantly convert OST to Outlook data file format within a few simple steps. There is no file size limitation, one can convert n number of files at a time without any error. It supports simple GUI, both technical and non-technical users can easily handle and works with this software. MS Outlook installation is not required for the conversion process. It was compatible with all the latest and below versions of MS Outlook and Windows OS including Windows 11.