sudo -u apache php /var/www/html/nextcloud/occ config:app:set dav create_example_contact --value=false --type=boolean
or
sudo -u apache php /var/www/html/nextcloud/occ config:app:set dav enableDefaultContact --value=false --type=boolean
sudo -u apache php /var/www/html/nextcloud/occ config:app:set dav create_example_event --value=false --type=boolean
sudo -u apache php /var/www/html/nextcloud/occ config:app:set dav system_addressbook_exposed --value=“no”
May it help other people, with unwanted unasked automatic enabled features that impact hundreds of users and hours of admin work. The topic I found around this was automatically closed.
grep -R “create_example” /var/www/html/nextcloud/apps/
create_example_contact may not be working as I can’t find the code hook, need to test this further and if system_addressbook_exposed is enough.