Open .ics calendar events from thunderbird

I just found out today that if you add the lightning calendar addon to thunderbird it starts understanding calendar invites you receive from outlook. You get an attachment in the email called meeting.ics that you can then open with Outlook.

It is very convenient as I still think that thunderbird is the best email client but lightning is very poor as calendar application. I can still use outlook and exchange capabilities while using thunderbird for email. Great!

This is what you get as message after doing that:


You don't have to Accept the meeting with thunderbird, ignore that part and just open the .ics file with outlook and do the Accept-Decline thing there.