Thunderbird Lightning CalDav calendar
How to add CalDav link from Vivaldi Mail/Calendar in Thunderbird Lightning? In Lightning I create new calendar (New Calendar / On the network / mark CalDAV and add link ( copy link from "Mobile Sync settings") in location box) and when I try to sync I couldn't. Calendar is always off. I try to turn on, but won't stay on.
there was a mixup in the URL in the backend of the webmail.
If you could copy the new URL from the Sync section in settings and add that one to Thunderbird Lightning it should work as expected.
Just remember to choose CalDAV and to use your full vivaldi.net email address when you sign in.