MS Outlook is often prone to errors and corruption. Similarly, many users encounter the most common error of MS Outlook i.e. “OST File Not Recognized by Outlook”. If you have also experienced it, we have got you covered. This can be generally caused due OST file corruption. You can use different solutions, and an expert OST to PST Converter to solve this issue. Also, to know more you can refer to: https://www.sysinfotools.com/blog/ost-file-not-recognized-by-outlook/