If you want to convert live mail calendar items so you can use very carefully Dux best live mail calendar converter software because I have already experienced this software. This tool very easily converts live mail calendar items into PST outlook format and it also converts calendar.EDB files into another formatting style like MSG, CSV, HTML, and TXT.

For more info:
https://www.duxdatarecovery.com/live-mail-calendar-converter/windows-live-mail-calendar-recovery/