You can create shared calendars in the CSIC email platform and then use them in Thunderbird. To do so, go here and login with your CSIC account.
Once logged in, your mailbox will be shown, you can go to the calendar section by clicking in the icon at the top-right.
Click in the add icon (+) to create a new calendar and give it a name.
Once created, click in the three dots to toggle the vertical menu and then go to “Sharing…”.
In the search bar, type the email of the person you want to share the calendar with and select it.
Check the checkboxes according to your preferences and click “save”.
With this, the person has access to your calendar. Now, click in the three dots to toggle the vertical menu and then go to “Links to this Calendar”.
Copy the “CalDAV URL” under the section “Authenticated User Access” and send it to the other people.
The next steps are the same as in the presonal calendar configuration, each person you shared the calendar with, has follow it in order to configure the shared calendar in Thunderbird. Open Thunderbird, go to Calendar and click in “New Calendar”, a new window will pop out.
Select “On the Network” and click “Next”.
Next, write your CSIC username in “User name” and paste the CalDAV link that you copied before. Then click “Find Calendars” and you will be prompted to put your password.
Finally, a final window where you can customize your calendar will be shown, click “Subscribe” to end the configuration process.
