Synchronize your GMX
Organizer with Thunderbird to make sure, that your appointments are up to
Calendar functionality was integrated into Thunderbird with version 78.0. If
you don't see any options to add or view a calendar, please make sure to update
Thunderbird to the latest version.
Example: For the e-mail address email@example.com, you enter https://firstname.lastname@example.org/calendar/ as the
If you want to synchronize other GMX
Organizers with Thunderbird, repeat steps 4 through 14.