I have find this

• Remote Addressbook option (Composition -> Addressing -> Directory Server) doesn't save configurations
• if i select Users, auto-complete works
• if i reboot Thunderbird i lost configuration: Directory Server: nothing
• if i select Users, auto-complete doesn't works

Thunderbird without sogo addons doesn't have this beaviour

Are you using SOGo Integrator?

If so, show your site.js configuration file together with your GNUstep defaults for SOGo.

{
NSGlobalDomain = {
};
sogod = {
NGUseUTF8AsURLEncoding = YES;
OCSFolderInfoURL = "mysql://sogo:**@localhost/sogo/sogo_folder_info";
SOGoACLsSendEMailNotifications = NO;
SOGoAppointmentSendEMailNotifications = YES;
SOGoAppointmentSendEMailReceipts = YES;
SOGoAuthenticationMethod = LDAP;
SOGoDraftsFolderName = Drafts;
SOGoEnablePublicAccess = YES;
SOGoFoldersSendEMailNotifications = NO;
SOGoIMAPServer = localhost;
SOGoMailDomain = nethesis.it;
SOGoMailingMechanism = smtp;
SOGoProfileURL = "mysql://sogo:*****@localhost/sogo/sogo_user_profile";

 SOGoSMTPServer = localhost;
    SOGoSentFolderName = Sent;
    SOGoSuperUsernames = (
        admin
    );
    SOGoTimeZone = Europe/Rome;
    SOGoTrashFolderName = Trash;
    SOGoUserSources = (
        {
            CNFieldName = cn;
            IDFieldName = uid;
            UIDFieldName = uid;
            baseDN = "ou=Users,dc=nethesis,dc=it";
            bindFields = uid;
            canAuthenticate = YES;
            displayName = "Users";
            hostname = localhost;
            id = users;
            isAddressBook = YES;
            port = 389;
            type = ldap;
        },
        {  
            CNFieldName = cn;
            IDFieldName = cn;
            UIDFieldName = cn;
            baseDN = "ou=Groups,dc=nethesis,dc=it";
            bindFields = cn;
            canAuthenticate = YES;
            displayName = "Groups";
            hostname = localhost;
            id = groups;
            isAddressBook = YES;
            port = 389;
            type = ldap;
        }
    );
    WOMessageUseUTF8 = YES;
    WOParsersUseUTF8 = YES;
    WOPort = 127.0.0.1:20000;
    WOUseRelativeURLs = YES;
};

}

pref("sogo-integrator.disable-calendaring", false);
pref("sogo-integrator.autocomplete.server.urlid", "public");
pref("javascript.options.showInConsole", true);
pref("nglayout.debug.disable_xul_cache", true);
pref("browser.dom.window.dump.enabled", true);
pref("javascript.options.strict", true);
pref("sogo-connector.autoComplete.commentAttribute", "notes");
pref("calendar.alarms.showmissed", false);
pref("calendar.caldav.sched.enabled", true);

You have:

pref("sogo-integrator.autocomplete.server.urlid", "public");

while your ID sources are:

users
groups

Fix this.

From TB about:config
Preference: sogo-integrator.autocomplete.server.urlid
Value: Users

I test "users" value too, but nothing, same problem.
For http://sogo.nu/bugs/view.php?id=782 too

Tested on ubuntu and winxp

you are right Ludovic, only with tb2 and sogo 1.3.1 but i have 2 address book "users" and "groups", and i will add another very soon. How can i search in all address book? What is the correct sintax?
pref("sogo-integrator.autocomplete.server.urlid", "users")

With correctly prefs, it works.