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Calendar integration under Thunderbird

Utilization of the Add-Ons of Lightning for the calendar integration.

Lightning is an add-on for calendar management, which is now installed by default during the installation of Thunderbird.

By default, a local calendar is set up when using Lightning, but the calendars created on our e-mail server and also calendars made available for sharing can be integrated in this way via the CalDAV protocol.

To work smoothly with such a product, it is important to regularly import resulting updates for the both the software and the add-ons so that they work together properly.

Installing Lightning

During the installation of Thunderbird the add-on Lightning is now installed directly, the decision whether you use it is up to you.

After succesful installation of Thunderbird a window appears at the bottom of the screen in which you are informed about the integration of Lightning and via the button "Disable" or "Keep" the calendar functions are removed or used after a restart.

Lightning Leiste.png

Subsequent activation

If you later decide to use the calendar function, open the Thunderbird application menu and call up the add-ons management.


There you click on the menu item "Extensions"

Lightning aktivieren.png

and can directly activate Lightning on the right side of the window, which integrates the calendar function after restarting Thunderbird.

You can click on the calendar icon in the upper right side to switch to the calendar view.

Kalender lokal

This calendar is a local calendar that is not on the server. Therefore, it can neither be used on another computer or mobile device, nor shared with any other person.


Integration of the calendar from the e-mail server (calendar)

The calendar provided with each Uni-ID on the e-mail server is called "Calendar" and can be integrated into Lightning the following way:


  1. Use the calendar icon to switch to calendar view.
  2. Right-click in he left area under Calendar to open the following context menu and select "New Calendar".Kontextmenü Kalender
  3. Select the option "On the Network" and click on "Next".Kalender fertig
  4. The calendar is integrated by the "CalDAV" format and has the following address:   Important: Upper and lower case must be taken into account!CalDAV Kalender
  5. Under name enter any name under which this calendar will be integrated into Lightning. The colour for appointments is also selected here (as different as possible) and reminders are switched on/off. Anzeigenamen
  6. After clicking on "Next" authentication is required.Authentifizierung
  7. Afterwards you only have to click on the button "Finish" to display the calendar.Kalender fertig
  8. The integrated network calendar will now appear below the local calendar with the name of your choice. However, it is always the "calendar" provided by the e-mail server. Netzkalender.png

When entering appointments, the correct calendar must be selected under "Calendar":


Integrate foreign calendars

The owner of the calendar must have set up the corresponding rights to the calendar for you beforehand. Without these, the desired calendar cannot be accessed. (see Allocation of Rights)

The owner must then tell you his "Uni-ID" (not e-email alias) and the exact "calendar name". On the h!Pronto webmail interface this is done via an automatically generated e-mail.

For different subdomains the entire e-mail address must be entered either in the case if the allocation of rights as well as during the integration of the calendar.

Except for the address of the calendar, the procedure is the same as for your own calendar "Calendar":

Adress within the same domain:

Adress for different domains:ä whereby the [Email protection active, please enable JavaScript.] is also possible.



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