So this is what i've done, following stephdl and Stefano_Zamboni. Many
thanks to them
By the way stephdl, i know you need help but at this time i can't.
Really sorry about that. Bon courage
So, this is how to prevent the public ldap adressbook from appearing in
First, open :
Find 50ADDRESSBOOK_SETTINGS, which is what i was looking for.
I could have removed it following stephdl, but i have prefered to create
my own template.
Create a relative path, NOT an absolute one as i initially did
mkdir -p /etc/roundcubemail/config.inc.php/
Go to the directory you created :
Copy the original file in the current directory :
Remove the first part of the file (LDAP and AD are useless for me).
There's another trick : you must remove 'public' where the file deals
"// An ordered array of the ids of the addressbooks that should be searched
// when populating address autocomplete fields server-side."
Instead of :
$config['autocomplete_addressbooks'] = array('sql','public');
$config['autocomplete_addressbooks'] = array('sql');
Save your configuration file.
As stated in the Nethserver documentation