For NC 12, there was a reported bug with authentication (not sure if
it existed before as well) and it will be fixed in 12.0.1 which is
expected soon (end of this month):
https://github.com/nextcloud/server/issues/5088
Thanks.
If you are using NC 11, for me the well-known-redirections worked
with apple products:
https://docs.nextcloud.com/server/11/admin_manual/issues/general_troubleshooting.html#troubleshooting-contacts-calendar
Well, that didn’t work.
With an .htaccess as follows:
Redirect 301 /.well-known/carddav /nextcloud/remote.php/dav
Redirect 301 /.well-known/caldav /nextcloud/remote.php/dav/principals/users/charles/
I get, in my error.log:
/var/www/.htaccess: Redirect not allowed here
Please include an actual working .htaccess.