You can easily convert the EML files to Outlook PST format, then need is to perform the below steps: Start the EML to Outlook Converter as administrator. Browse the EML files or a folder containing EML files. Preview the added EML file data and attachments files. Select the saving format as PST from the drop-down list. You can remove the duplicate emails from the added EML files. Select the destination path for the resultant folder. Click Convert to start the conversion of EML files to PST.