Frequent Questions: Webmail

What is the URL format to use to configure Thunderbird/Lightning?

The form is like this (replace the generic info in the example with those of your specific account):
https://sogo3.gandi.net/SOGo/dav/user@domain.tld/Calendar/personal/

Note too that a connector exists for Thunderbird at https://sogo.nu/download.html#/frontends