I have an additional calendar “Vacation” for my personal vacation dates.
At the moment, Nextcloud shows only the busy times of the calendar “Personal”.
I would suggest an option for each calendar as to whether it should be considered for displaying busy times.
Thanks for the fast answer.
Nextcloud does it right. It is a Mozilla Thunderbird problem. Appointments with start and end time are marked as “Busy” and all-day appointments as “Available”.
Does anyone know a solution how to change this behavior in Thunderbird?
Thunderbird (Lightning) all-day events can still be marked as busy. The default for all-day events is to show them as free. To change the event to busy, select Options > Show Time As > Busy.