I believe this was reported already with ticket 0004600. I would like to elaborate and possibly flag a problem.

I LOVE that sogo shows the View Raw Source to see the ics properies - awesome job!

I am just trying to bump this up as it is an old ticket. I heavily use multiple reminders for future jobs or procedures. I have imported ics from baikal caldav/cardav and noticed that sogo does not pickup the multiple reminders. So anyone who relies on multiple reminders and does imports will have problems getting their reminders.

This is the baikal ics VALARM before import:

BEGIN:VALARM
ACTION:DISPLAY
TRIGGER:-PT15M
DESCRIPTION:Default Mozilla Description
END:VALARM
BEGIN:VALARM
ACTION:DISPLAY
TRIGGER:-P5D
DESCRIPTION:Default Mozilla Description
END:VALARM

This is the ics VALARM after it was imported into sogo:

BEGIN:VALARM
TRIGGER;VALUE=DURATION;RELATED=START:-PT15M
ACTION:DISPLAY
DESCRIPTION: text
END:VALARM

I can remove sensitive data and provide you the before and after ics files if you wish.