Best to change pst file to PDF format!
To convert a PST file to PDF format manually, you can use Microsoft Outlook. Open the PST file in Outlook, select the emails you want to save, and use the File > Save As option to save the email as an HTML or TXT file. Then, open the saved file in a word processor like Microsoft Word and export it as a PDF. However, this method can be time-consuming and lacks batch processing capability.