Convert PST file to iCal with all attachments using PST to ICS Converter Tool. The Tool supports batch mode option which helps users to export multiple Outlook to ICS file at one time. Users can convert any edition of Outlook (2021, 2019, 2016, 2013, 2010, 2007, etc.) to ICS format with all attachments. Free evaluation is also available for users to know how to convert PST to ICS file. But it supports to convert 25 calendars from PST to ICS. If you want to convert batch Outlook to ICS, then go ahead and purchase its license edition.