Lightning

Lightning is an Add-On for thunderbird to show remote calendars e.g. of our Zimbra Mailserver.

• Open Thunderbird and switch to the Calendar view (lower left corner):

• Move the mouse over the still existing local Thunderbird calendar Home, press the right mouse button and choose New Calendar. Follow the next screenshots.

• Replace the username in the URL with your own.

Further Calendars

• You can configure more than one calendar.
• To find out the right URL:

  • Switch to Firefox and call http://mail.math.uzh.ch .

  • Choose tab Calendar.

  • Move the mouse over the calendar name on the left side.
  • Right mouse click, choose "Share Calendar".
  • Copy/paste the Calendar URL (highlighted in the screenshot).

Known problems

• If you want to delete an appointment, best do this via web interface in Firefox.

• If you really want to delete appointments in Thunderbird, you have to:
  • Open the event

  • Choose: Option > Status > Canceled > Save and close.

  • Delete the event with: right mouse click > delete.

  • If you delete the appointment without prior canceling, the appointment will be deleted in Thunderbird, but not in Zimbra.
• Calendar gets out of sync:
  • From time to time it happens that Thunderbird/Lightning don't show any new appointments or changes.
  • Delete the calendar in Thunderbird (you only delete the connection, not the calendar itself).
  • reconnect the calendar.
• Reminder

  • If you create a new appointment in Tunderbird, the default is not to remind you.

  • If you create a new appointment in the Zimbra webinterface, the default is to remind you - take care about many unwanted reminders which will appear in Thunderbird suddenly!!!