[imp] predefine Addressbooks

[Makeri]

Hello !

We have multiple Addressbooks in ldap (privat, public ...)

How can i (as Administrator) predefine the Addressbooks for search people if
user send a mail and type some character.

I mean the field in Preferences of Mail -> Address Books -> "Choose the order of
address books to search when expanding address"

I look in prefs.php (where i predefine other settings for all user), but there
is no variable to set the "default active addressboks".