How to find the calendar ID: You can find out the complete path of any of your mailbox.org calendars or task list by visiting your Cloud Office at mailbox.org. Log in, open the calendar or tasks view you want to embed, and click on the menu symbol right next to it . From the opening menu, select Properties. A dialogue window will open, and there is a field named CalDAV URL that has the exact path.
4.) Assign a name to your calendar, pick a custom colour, and check that the correct mailbox.org e-mail account has been selected. If an e-mail account does not exist yet, you have to create an account first.
6.) OPTIONAL - In case you want to embed several calendars from different accounts, please proceed as follows:
Attention: You make the following modifications at your own risk. We assume neither liability nor support!
a. The Lightning add-on has to be installed, which should be the default case for the latest Thunderbird Versions. It has to be activated.
c. Go to "Advanced" and then choose the tab "General". There click on "Config Editor..."
d. Confirm the warning "I'll be careful, I promise!"
e. In the top bar search for “calendar.network.multirealm”. On the result page, choose the correct entry and change the value from "false" to "true" by double clicking on the result.
f. Restart Thunderbird.
Should there be problems with the installation described here: Many customers are very satisfied with the add-on TBSync, which needs an additional add-on "Provider for CalDAV & CardDAV", offers more options for synchronization and apparently a more robust synchronization.
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