diff --git a/htdocs/adherents/ldap.php b/htdocs/adherents/ldap.php
index 4b64290f107..70624983815 100644
--- a/htdocs/adherents/ldap.php
+++ b/htdocs/adherents/ldap.php
@@ -158,13 +158,13 @@ print dol_get_fiche_end();
  */
 print '<div class="tabsAction">';
 
-if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && $conf->global->LDAP_MEMBER_ACTIVE != 'ldap2dolibarr') {
+if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && $conf->global->LDAP_MEMBER_ACTIVE != Ldap::SYNCHRO_LDAP_TO_DOLIBARR) {
 	print '<div class="inline-block divButAction"><a class="butAction" href="'.$_SERVER["PHP_SELF"].'?id='.$object->id.'&amp;action=dolibarr2ldap">'.$langs->trans("ForceSynchronize").'</a></div>';
 }
 
 print "</div>\n";
 
-if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && $conf->global->LDAP_MEMBER_ACTIVE != 'ldap2dolibarr') {
+if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && $conf->global->LDAP_MEMBER_ACTIVE != Ldap::SYNCHRO_LDAP_TO_DOLIBARR) {
 	print "<br>\n";
 }
 
diff --git a/htdocs/adherents/type_ldap.php b/htdocs/adherents/type_ldap.php
index 43902a5e1bf..d7650a8de2b 100644
--- a/htdocs/adherents/type_ldap.php
+++ b/htdocs/adherents/type_ldap.php
@@ -124,13 +124,13 @@ print dol_get_fiche_end();
 
 print '<div class="tabsAction">';
 
-if ($conf->global->LDAP_MEMBER_TYPE_ACTIVE == 1) {
+if (getDolGlobalInt('LDAP_MEMBER_TYPE_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 	print '<a class="butAction" href="'.$_SERVER["PHP_SELF"].'?rowid='.$object->id.'&action=dolibarr2ldap">'.$langs->trans("ForceSynchronize").'</a>';
 }
 
 print "</div>\n";
 
-if ($conf->global->LDAP_MEMBER_TYPE_ACTIVE == 1) {
+if (getDolGlobalInt('LDAP_MEMBER_TYPE_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 	print "<br>\n";
 }
 
diff --git a/htdocs/admin/ldap.php b/htdocs/admin/ldap.php
index 167c48d84c0..99c86f783fc 100644
--- a/htdocs/admin/ldap.php
+++ b/htdocs/admin/ldap.php
@@ -100,7 +100,7 @@ if (empty($reshook)) {
 		if (!dolibarr_set_const($db, 'LDAP_MEMBER_TYPE_ACTIVE', GETPOST("activememberstypes", 'aZ09'), 'chaine', 0, '', $conf->entity)) {
 			$error++;
 		}
-		if (!dolibarr_set_const($db, 'LDAP_PASSWORD_HASH_TYPE', GETPOST("'LDAP_PASSWORD_HASH_TYPE'", 'aZ09'), 'chaine', 0, '', $conf->entity)) {
+		if (!dolibarr_set_const($db, 'LDAP_PASSWORD_HASH_TYPE', GETPOST("LDAP_PASSWORD_HASH_TYPE", 'aZ09'), 'chaine', 0, '', $conf->entity)) {
 			$error++;
 		}
 
@@ -150,13 +150,9 @@ print "</tr>\n";
 // Synchro utilisateurs/groupes active
 
 print '<tr class="oddeven"><td>'.$langs->trans("LDAPDnSynchroActive").'</td><td>';
-$arraylist = array();
-$arraylist['0'] = $langs->trans("No");
-$arraylist['ldap2dolibarr'] = $langs->trans("LDAPToDolibarr");
-$arraylist['dolibarr2ldap'] = $langs->trans("DolibarrToLDAP");
-print $form->selectarray('activesynchro', $arraylist, $conf->global->LDAP_SYNCHRO_ACTIVE);
+print $formldap->selectLdapDnSynchroActive(getDolGlobalInt('LDAP_SYNCHRO_ACTIVE'), 'activesynchro');
 print '</td><td><span class="opacitymedium">'.$langs->trans("LDAPDnSynchroActiveExample").'</span>';
-if ($conf->global->LDAP_SYNCHRO_ACTIVE && !$conf->global->LDAP_USER_DN) {
+if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && empty($conf->global->LDAP_USER_DN)) {
 	print '<br><span class="error">'.$langs->trans("LDAPSetupNotComplete").'</span>';
 }
 print '</td></tr>';
@@ -164,32 +160,21 @@ print '</td></tr>';
 // Synchro contact active
 if (!empty($conf->societe->enabled)) {
 	print '<tr class="oddeven"><td>'.$langs->trans("LDAPDnContactActive").'</td><td>';
-	$arraylist = array();
-	$arraylist['0'] = $langs->trans("No");
-	$arraylist['1'] = $langs->trans("DolibarrToLDAP");
-	print $form->selectarray('activecontact', $arraylist, $conf->global->LDAP_CONTACT_ACTIVE);
+	print $formldap->selectLdapDnSynchroActive(getDolGlobalInt('LDAP_CONTACT_ACTIVE'), 'activecontact', array(Ldap::SYNCHRO_LDAP_TO_DOLIBARR));
 	print '</td><td><span class="opacitymedium">'.$langs->trans("LDAPDnContactActiveExample").'</span></td></tr>';
 }
 
 // Synchro member active
 if (!empty($conf->adherent->enabled)) {
 	print '<tr class="oddeven"><td>'.$langs->trans("LDAPDnMemberActive").'</td><td>';
-	$arraylist = array();
-	$arraylist['0'] = $langs->trans("No");
-	$arraylist['1'] = $langs->trans("DolibarrToLDAP");
-	$arraylist['ldap2dolibarr'] = $langs->trans("LDAPToDolibarr").' ('.$langs->trans("SupportedForLDAPImportScriptOnly").')';
-	print $form->selectarray('activemembers', $arraylist, $conf->global->LDAP_MEMBER_ACTIVE);
+	print $formldap->selectLdapDnSynchroActive(getDolGlobalInt('LDAP_MEMBER_ACTIVE'), 'activemembers', array(), 2);
 	print '</td><td><span class="opacitymedium">'.$langs->trans("LDAPDnMemberActiveExample").'</span></td></tr>';
 }
 
 // Synchro member type active
 if (!empty($conf->adherent->enabled)) {
 	print '<tr class="oddeven"><td>'.$langs->trans("LDAPDnMemberTypeActive").'</td><td>';
-	$arraylist = array();
-	$arraylist['0'] = $langs->trans("No");
-	$arraylist['1'] = $langs->trans("DolibarrToLDAP");
-	$arraylist['ldap2dolibarr'] = $langs->trans("LDAPToDolibarr").' ('.$langs->trans("SupportedForLDAPImportScriptOnly").')';
-	print $form->selectarray('activememberstypes', $arraylist, $conf->global->LDAP_MEMBER_TYPE_ACTIVE);
+	print $formldap->selectLdapDnSynchroActive(getDolGlobalInt('LDAP_MEMBER_TYPE_ACTIVE'), 'activememberstypes', array(), 2);
 	print '</td><td><span class="opacitymedium">'.$langs->trans("LDAPDnMemberTypeActiveExample").'</span></td></tr>';
 }
 
@@ -206,53 +191,39 @@ print "</tr>\n";
 
 // Type
 print '<tr class="oddeven"><td>'.$langs->trans("Type").'</td><td>';
-$arraylist = array();
-$arraylist['activedirectory'] = 'Active Directory';
-$arraylist['openldap'] = 'OpenLdap';
-$arraylist['egroupware'] = 'Egroupware';
-print $form->selectarray('type', $arraylist, $conf->global->LDAP_SERVER_TYPE);
+print $formldap->selectLdapServerType(getDolGlobalString('LDAP_SERVER_TYPE'), 'type');
 print '</td><td>&nbsp;</td></tr>';
 
 // Version
 print '<tr class="oddeven"><td>'.$langs->trans("Version").'</td><td>';
-$arraylist = array();
-$arraylist['3'] = 'Version 3';
-$arraylist['2'] = 'Version 2';
-print $form->selectarray('LDAP_SERVER_PROTOCOLVERSION', $arraylist, $conf->global->LDAP_SERVER_PROTOCOLVERSION);
+print $formldap->selectLdapServerProtocolVersion(getDolGlobalString('LDAP_SERVER_PROTOCOLVERSION'), 'LDAP_SERVER_PROTOCOLVERSION');
 print '</td><td><span class="opacitymedium">'.$langs->trans("LDAPServerProtocolVersion").'</span></td></tr>';
 
 // Serveur primaire
 print '<tr class="oddeven"><td>';
 print $langs->trans("LDAPPrimaryServer").'</td><td>';
-print '<input class="minwidth200" type="text" name="host" value="'.$conf->global->LDAP_SERVER_HOST.'">';
+print '<input class="minwidth200" type="text" name="host" value="'.getDolGlobalString('LDAP_SERVER_HOST').'">';
 print '</td><td><span class="opacitymedium">'.$langs->trans("LDAPServerExample").'</span></td></tr>';
 
 // Serveur secondaire
 print '<tr class="oddeven"><td>';
 print $langs->trans("LDAPSecondaryServer").'</td><td>';
-print '<input class="minwidth200" type="text" name="slave" value="'.$conf->global->LDAP_SERVER_HOST_SLAVE.'">';
+print '<input class="minwidth200" type="text" name="slave" value="'.getDolGlobalString('LDAP_SERVER_HOST_SLAVE').'">';
 print '</td><td><span class="opacitymedium">'.$langs->trans("LDAPServerExample").'</span></td></tr>';
 
 // Port
 print '<tr class="oddeven"><td>'.$langs->trans("LDAPServerPort").'</td><td>';
-if (!empty($conf->global->LDAP_SERVER_PORT)) {
-	print '<input class="width75" type="text" name="port" value="'.$conf->global->LDAP_SERVER_PORT.'">';
-} else {
-	print '<input class="width75" type="text" name="port" value="389">';
-}
+print '<input class="width75" type="text" name="port" value="'.getDolGlobalString('LDAP_SERVER_PORT', '389').'">';
 print '</td><td><span class="opacitymedium">'.$langs->trans("LDAPServerPortExample").'</span></td></tr>';
 
 // DNserver
 print '<tr class="oddeven"><td>'.$langs->trans("LDAPServerDn").'</td><td>';
-print '<input class="minwidth300" type="text" name="dn" value="'.$conf->global->LDAP_SERVER_DN.'">';
+print '<input class="minwidth300" type="text" name="dn" value="'.getDolGlobalString('LDAP_SERVER_DN').'">';
 print '</td><td><span class="opacitymedium">'.$langs->trans("LDAPServerDnExample").'</span></td></tr>';
 
 // Utiliser TLS
 print '<tr class="oddeven"><td>'.$langs->trans("LDAPServerUseTLS").'</td><td>';
-$arraylist = array();
-$arraylist['0'] = $langs->trans("No");
-$arraylist['1'] = $langs->trans("Yes");
-print $form->selectarray('usetls', $arraylist, $conf->global->LDAP_SERVER_USE_TLS);
+print $form->selectyesno('usetls', getDolGlobalInt('LDAP_SERVER_USE_TLS'), 1);
 print '</td><td><span class="opacitymedium">'.$langs->trans("LDAPServerUseTLSExample").'</span></td></tr>';
 
 // Password hash type
@@ -267,7 +238,7 @@ print "</tr>\n";
 // DNAdmin
 print '<!-- LDAP_ADMIN_DN -->';
 print '<tr class="oddeven"><td>'.$langs->trans("LDAPAdminDn").'</td><td>';
-print '<input class="minwidth300" type="text" name="admin" value="'.$conf->global->LDAP_ADMIN_DN.'">';
+print '<input class="minwidth300" type="text" name="admin" value="'.getDolGlobalString('LDAP_ADMIN_DN').'">';
 print '</td><td class="maxwidthhalf"><span class="opacitymedium">'.$langs->trans("LDAPAdminDnExample").'</span></td></tr>';
 
 // Pass
@@ -276,7 +247,7 @@ print '<tr class="oddeven"><td>'.$langs->trans("LDAPPassword").'</td><td>';
 if (!empty($conf->global->LDAP_ADMIN_PASS)) {
 	print '<input class="minwidth150" type="password" name="pass" value="'.$conf->global->LDAP_ADMIN_PASS.'">'; // je le met en visible pour test
 } else {
-	print '<input class="minwidth150" type="text" name="pass" value="'.$conf->global->LDAP_ADMIN_PASS.'">';
+	print '<input class="minwidth150" type="text" name="pass" value="">';
 }
 print '</td><td><span class="opacitymedium">'.$langs->trans('Password').' (ex: secret)</span></td></tr>';
 
@@ -306,17 +277,17 @@ if (function_exists("ldap_connect")) {
 		if ($result > 0) {
 			// Test ldap connect and bind
 			print img_picto('', 'info').' ';
-			print '<span class="ok">'.$langs->trans("LDAPTCPConnectOK", $ldap->connectedServer, $conf->global->LDAP_SERVER_PORT).'</span>';
+			print '<span class="ok">'.$langs->trans("LDAPTCPConnectOK", $ldap->connectedServer, getDolGlobalString('LDAP_SERVER_PORT')).'</span>';
 			print '<br>';
 
 			if (!empty($conf->global->LDAP_ADMIN_DN) && !empty($conf->global->LDAP_ADMIN_PASS)) {
 				if ($result == 2) {
 					print img_picto('', 'info').' ';
-					print '<span class="ok">'.$langs->trans("LDAPBindOK", $ldap->connectedServer, $conf->global->LDAP_SERVER_PORT, $conf->global->LDAP_ADMIN_DN, preg_replace('/./i', '*', $conf->global->LDAP_ADMIN_PASS)).'</span>';
+					print '<span class="ok">'.$langs->trans("LDAPBindOK", $ldap->connectedServer, getDolGlobalString('LDAP_SERVER_PORT'), $conf->global->LDAP_ADMIN_DN, preg_replace('/./i', '*', $conf->global->LDAP_ADMIN_PASS)).'</span>';
 					print '<br>';
 				} else {
 					print img_picto('', 'error').' ';
-					print '<span class="error">'.$langs->trans("LDAPBindKO", $ldap->connectedServer, $conf->global->LDAP_SERVER_PORT, $conf->global->LDAP_ADMIN_DN, preg_replace('/./i', '*', $conf->global->LDAP_ADMIN_PASS)).'</span>';
+					print '<span class="error">'.$langs->trans("LDAPBindKO", $ldap->connectedServer, getDolGlobalString('LDAP_SERVER_PORT'), $conf->global->LDAP_ADMIN_DN, preg_replace('/./i', '*', $conf->global->LDAP_ADMIN_PASS)).'</span>';
 					print '<br>';
 					print $langs->trans("Error").' '.$ldap->error;
 					print '<br>';
@@ -342,7 +313,7 @@ if (function_exists("ldap_connect")) {
 			$ldap->unbind();
 		} else {
 			print img_picto('', 'error').' ';
-			print '<span class="error">'.$langs->trans("LDAPTCPConnectKO", $ldap->connectedServer, $conf->global->LDAP_SERVER_PORT).'</span>';
+			print '<span class="error">'.$langs->trans("LDAPTCPConnectKO", $ldap->connectedServer, getDolGlobalString('LDAP_SERVER_PORT')).'</span>';
 			print '<br>';
 			print $langs->trans("Error").' '.$ldap->error;
 			print '<br>';
diff --git a/htdocs/admin/ldap_groups.php b/htdocs/admin/ldap_groups.php
index 82ee85b9a20..5723183735e 100644
--- a/htdocs/admin/ldap_groups.php
+++ b/htdocs/admin/ldap_groups.php
@@ -218,7 +218,7 @@ print '</form>';
 /*
  * Test de la connexion
  */
-if ($conf->global->LDAP_SYNCHRO_ACTIVE == 'dolibarr2ldap') {
+if (getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 	$butlabel = $langs->trans("LDAPTestSynchroGroup");
 	$testlabel = 'testgroup';
 	$key = $conf->global->LDAP_KEY_GROUPS;
@@ -226,7 +226,7 @@ if ($conf->global->LDAP_SYNCHRO_ACTIVE == 'dolibarr2ldap') {
 	$objectclass = $conf->global->LDAP_GROUP_OBJECT_CLASS;
 
 	show_ldap_test_button($butlabel, $testlabel, $key, $dn, $objectclass);
-} elseif ($conf->global->LDAP_SYNCHRO_ACTIVE == 'ldap2dolibarr') {
+} elseif (getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_LDAP_TO_DOLIBARR) {
 	$butlabel = $langs->trans("LDAPTestSearch");
 	$testlabel = 'testsearchgroup';
 	$key = $conf->global->LDAP_KEY_GROUPS;
diff --git a/htdocs/admin/ldap_members_types.php b/htdocs/admin/ldap_members_types.php
index 05572dc8bbf..7933b59d5e0 100644
--- a/htdocs/admin/ldap_members_types.php
+++ b/htdocs/admin/ldap_members_types.php
@@ -188,7 +188,7 @@ print '</form>';
 /*
  * Test de la connexion
  */
-if ($conf->global->LDAP_MEMBER_TYPE_ACTIVE == '1') {
+if (getDolGlobalInt('LDAP_MEMBER_TYPE_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 	$butlabel = $langs->trans("LDAPTestSynchroMemberType");
 	$testlabel = 'testmembertype';
 	$key = $conf->global->LDAP_KEY_MEMBERS_TYPES;
diff --git a/htdocs/admin/ldap_users.php b/htdocs/admin/ldap_users.php
index 33bec1cb2e8..f395eb88fb4 100644
--- a/htdocs/admin/ldap_users.php
+++ b/htdocs/admin/ldap_users.php
@@ -405,7 +405,7 @@ print '</form>';
 /*
  * Test de la connexion
  */
-if (getDolGlobalString('LDAP_SYNCHRO_ACTIVE') == 'dolibarr2ldap') {
+if (getDolGlobalString('LDAP_SYNCHRO_ACTIVE') == Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 	$butlabel = $langs->trans("LDAPTestSynchroUser");
 	$testlabel = 'testuser';
 	$key = getDolGlobalString('LDAP_KEY_USERS');
@@ -413,7 +413,7 @@ if (getDolGlobalString('LDAP_SYNCHRO_ACTIVE') == 'dolibarr2ldap') {
 	$objectclass = getDolGlobalString('LDAP_USER_OBJECT_CLASS');
 
 	show_ldap_test_button($butlabel, $testlabel, $key, $dn, $objectclass);
-} elseif (getDolGlobalString('LDAP_SYNCHRO_ACTIVE') == 'ldap2dolibarr') {
+} elseif (getDolGlobalString('LDAP_SYNCHRO_ACTIVE') == Ldap::SYNCHRO_LDAP_TO_DOLIBARR) {
 	$butlabel = $langs->trans("LDAPTestSearch");
 	$testlabel = 'testsearchuser';
 	$key = getDolGlobalString('LDAP_KEY_USERS');
diff --git a/htdocs/contact/ldap.php b/htdocs/contact/ldap.php
index d29aab0386b..92b9c1ad337 100644
--- a/htdocs/contact/ldap.php
+++ b/htdocs/contact/ldap.php
@@ -136,13 +136,13 @@ print dol_get_fiche_end();
  */
 print '<div class="tabsAction">';
 
-if (!empty($conf->global->LDAP_CONTACT_ACTIVE) && $conf->global->LDAP_CONTACT_ACTIVE != 'ldap2dolibarr') {
+if (!empty($conf->global->LDAP_CONTACT_ACTIVE) && $conf->global->LDAP_CONTACT_ACTIVE != Ldap::SYNCHRO_LDAP_TO_DOLIBARR) {
 	print '<a class="butAction" href="'.$_SERVER["PHP_SELF"].'?id='.$object->id.'&amp;action=dolibarr2ldap">'.$langs->trans("ForceSynchronize").'</a>';
 }
 
 print "</div>\n";
 
-if (!empty($conf->global->LDAP_CONTACT_ACTIVE) && $conf->global->LDAP_CONTACT_ACTIVE != 'ldap2dolibarr') {
+if (!empty($conf->global->LDAP_CONTACT_ACTIVE) && $conf->global->LDAP_CONTACT_ACTIVE != Ldap::SYNCHRO_LDAP_TO_DOLIBARR) {
 	print "<br>\n";
 }
 
diff --git a/htdocs/core/class/conf.class.php b/htdocs/core/class/conf.class.php
index 044dc192426..cf54151d2d6 100644
--- a/htdocs/core/class/conf.class.php
+++ b/htdocs/core/class/conf.class.php
@@ -775,8 +775,8 @@ class Conf
 				$this->contrat->services->expires->warning_delay = (isset($this->global->MAIN_DELAY_RUNNING_SERVICES) ? $this->global->MAIN_DELAY_RUNNING_SERVICES : 0) * 86400;
 			}
 			if (isset($this->commande)) {
-				$this->bank->rappro					= new stdClass();
-				$this->bank->cheque					= new stdClass();
+				$this->bank->rappro	= new stdClass();
+				$this->bank->cheque	= new stdClass();
 				$this->bank->rappro->warning_delay = (isset($this->global->MAIN_DELAY_TRANSACTIONS_TO_CONCILIATE) ? $this->global->MAIN_DELAY_TRANSACTIONS_TO_CONCILIATE : 0) * 86400;
 				$this->bank->cheque->warning_delay = (isset($this->global->MAIN_DELAY_CHEQUES_TO_DEPOSIT) ? $this->global->MAIN_DELAY_CHEQUES_TO_DEPOSIT : 0) * 86400;
 			}
@@ -845,6 +845,23 @@ class Conf
 				}
 			}
 
+			// For backward compatibility
+			if (!empty($this->global->LDAP_SYNCHRO_ACTIVE)) {
+				if ($this->global->LDAP_SYNCHRO_ACTIVE == 'dolibarr2ldap') {
+					$this->global->LDAP_SYNCHRO_ACTIVE = 1;
+				} else if ($this->global->LDAP_SYNCHRO_ACTIVE == 'ldap2dolibarr') {
+					$this->global->LDAP_SYNCHRO_ACTIVE = 2;
+				}
+			}
+			// For backward compatibility
+			if (!empty($this->global->LDAP_MEMBER_ACTIVE) && $this->global->LDAP_MEMBER_ACTIVE == 'ldap2dolibarr') {
+				$this->global->LDAP_MEMBER_ACTIVE = 2;
+			}
+			// For backward compatibility
+			if (!empty($this->global->LDAP_MEMBER_TYPE_ACTIVE) && $this->global->LDAP_MEMBER_TYPE_ACTIVE == 'ldap2dolibarr') {
+				$this->global->LDAP_MEMBER_TYPE_ACTIVE = 2;
+			}
+
 			if (!empty($this->global->MAIN_TZUSERINPUTKEY)) {
 				$this->tzuserinputkey = $this->global->MAIN_TZUSERINPUTKEY;	// 'tzserver' or 'tzuserrel'
 			}
diff --git a/htdocs/core/class/html.formldap.class.php b/htdocs/core/class/html.formldap.class.php
new file mode 100644
index 00000000000..acee0bbbea7
--- /dev/null
+++ b/htdocs/core/class/html.formldap.class.php
@@ -0,0 +1,196 @@
+<?php
+/* Copyright (C) 2021	Regis Houssin	<regis.houssin@inodbox.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ *       \file       htdocs/core/class/html.formldap.class.php
+ *       \ingroup    core
+ *       \brief      File of class with ldap html predefined components
+ */
+require_once DOL_DOCUMENT_ROOT.'/core/class/html.form.class.php';
+
+/**
+ *      Class to manage generation of HTML components for ldap module
+ */
+class FormLdap
+{
+	/**
+	 * @var DoliDB Database handler.
+	 */
+	public $db;
+
+	/**
+	 * @var string Error code (or message)
+	 */
+	public $error = '';
+
+	/**
+	 * @var string[]	Array of error strings
+	 */
+	public $errors = array();
+
+
+	/**
+	 *	Constructor
+	 *
+	 *  @param		DoliDB		$db      Database handler
+	 */
+	public function __construct($db)
+	{
+		global $langs, $form;
+
+		if (!is_object($form)) {
+			$form = new Form($this->db);
+		}
+
+		$langs->loadLangs(array("admin", "ldap"));
+
+		$this->db = $db;
+	}
+
+	/**
+	 *  Return list of types of hash
+	 *
+	 *  @param	string		$selected		Preselected type
+	 *	@param  string		$htmlname		Name of field in form
+	 * 	@param	int			$showempty		Add an empty field
+	 *  @return	string						HTML select string
+	 */
+	public function selectLdapPasswordHashType($selected = 'md5', $htmlname = 'ldaphashtype', $showempty = 0)
+	{
+		global $form;
+
+		if (empty($selected)) {
+			$selected = 'md5';
+		}
+		if (empty($htmlname)) {
+			$htmlname = 'ldaphashtype';
+		}
+
+		$arraylist = array(
+			"pbkdf2sha256"	=> "PBKDF2_SHA256",
+			"ssha512"		=> "SSHA512",
+			"ssha256"		=> "SSHA256",
+			"ssha" 			=> "SSHA",
+			"sha"			=> "SHA",
+			"md5"			=> "MD5",
+			"smd5"			=> "SMD5",
+			"cryptmd5"		=> "CRYPT-MD5",
+			"cryptsha512"	=> "CRYPT-SHA512",
+			"cryptsha256"	=> "CRYPT-SHA256",
+			"crypt"			=> "CRYPT",
+			"clear"			=> "CLEAR"
+		);
+
+		return $form->selectarray($htmlname, $arraylist, $selected, $showempty);
+	}
+
+	/**
+	 *	Return list of type of synchronization
+	 *
+	 *	@param	int			$selected		Preselected type
+	 *	@param  string		$htmlname		Name of field in form
+	 *	@param	array		$exclude		Exclude values from the list
+	 *	@param	int			$scriptonly		Add warning if synchro only work with a script (0 = disable, 1 = Dolibarr2ldap, 2 = ldap2dolibarr, 3 = all)
+	 * 	@param	int			$showempty		Add an empty field
+	 *  @return	string						HTML select string
+	 */
+	public function selectLdapDnSynchroActive($selected = 0, $htmlname = 'activesynchro', $exclude = array(), $scriptonly = 0, $showempty = 0)
+	{
+		global $langs, $form;
+
+		if (empty($selected)) {
+			$selected = Ldap::SYNCHRO_NONE;
+		}
+		if (empty($htmlname)) {
+			$htmlname = 'activesynchro';
+		}
+
+		$dolibarr2ldaplabel = $langs->trans("DolibarrToLDAP") . (($scriptonly == 1 || $scriptonly == 3) ? " (".$langs->trans("SupportedForLDAPExportScriptOnly").")" : "");
+		$ldap2dolibarrlabel = $langs->trans("LDAPToDolibarr") . (($scriptonly == 2 || $scriptonly == 3) ? " (".$langs->trans("SupportedForLDAPImportScriptOnly").")" : "");
+
+		$arraylist = array(
+			Ldap::SYNCHRO_NONE				=> $langs->trans("No"),
+			Ldap::SYNCHRO_DOLIBARR_TO_LDAP	=> $dolibarr2ldaplabel,
+			Ldap::SYNCHRO_LDAP_TO_DOLIBARR	=> $ldap2dolibarrlabel
+		);
+
+		if (is_array($exclude) && !empty($exclude)) {
+			foreach($exclude as $value) {
+				if (array_key_exists($value, $arraylist)) {
+					unset($arraylist[$value]);
+				}
+			}
+		}
+
+		return $form->selectarray($htmlname, $arraylist, $selected, $showempty);
+	}
+
+	/**
+	 *  Return list of ldap server types
+	 *
+	 *  @param	string		$selected		Preselected type
+	 *	@param  string		$htmlname		Name of field in form
+	 * 	@param	int			$showempty		Add an empty field
+	 *  @return	string						HTML select string
+	 */
+	public function selectLdapServerType($selected = 'openldap', $htmlname = 'type', $showempty = 0)
+	{
+		global $form;
+
+		if (empty($selected)) {
+			$selected = 'openldap';
+		}
+		if (empty($htmlname)) {
+			$htmlname = 'type';
+		}
+
+		$arraylist = array(
+			'activedirectory'	=> 'Active Directory',
+			'openldap'			=> 'OpenLdap',
+			'egroupware'		=> 'Egroupware'
+		);
+
+		return $form->selectarray($htmlname, $arraylist, $selected, $showempty);
+	}
+
+	/**
+	 *  Return list of ldap server protocol version
+	 *
+	 *  @param	string		$selected		Preselected type
+	 *	@param  string		$htmlname		Name of field in form
+	 * 	@param	int			$showempty		Add an empty field
+	 *  @return	string						HTML select string
+	 */
+	public function selectLdapServerProtocolVersion($selected = '3', $htmlname = 'ldapprotocolversion', $showempty = 0)
+	{
+		global $form;
+
+		if (empty($selected)) {
+			$selected = '3';
+		}
+		if (empty($htmlname)) {
+			$htmlname = 'ldapprotocolversion';
+		}
+
+		$arraylist = array(
+			'3'	=> 'Version 3',
+			'2'	=> 'Version 2'
+		);
+
+		return $form->selectarray($htmlname, $arraylist, $selected, $showempty);
+	}
+}
diff --git a/htdocs/core/class/ldap.class.php b/htdocs/core/class/ldap.class.php
index a1921ea2217..bd0ccbee5ac 100644
--- a/htdocs/core/class/ldap.class.php
+++ b/htdocs/core/class/ldap.class.php
@@ -122,6 +122,21 @@ class Ldap
 	 */
 	public $result;
 
+	/**
+	 * No Ldap synchronization
+	 */
+	const SYNCHRO_NONE = 0;
+
+	/**
+	 * Dolibarr to Ldap synchronization
+	 */
+	const SYNCHRO_DOLIBARR_TO_LDAP = 1;
+
+	/**
+	 * Ldap to Dolibarr synchronization
+	 */
+	const SYNCHRO_LDAP_TO_DOLIBARR = 2;
+
 
 	/**
 	 *  Constructor
@@ -230,7 +245,7 @@ class Ldap
 							dol_syslog(get_class($this)."::connect_bind failed to start tls", LOG_WARNING);
 							$this->error = 'ldap_start_tls Failed to start TLS '.ldap_errno($this->connection).' '.ldap_error($this->connection);
 							$connected = 0;
-							$this->close();
+							$this->unbind();
 						}
 					}
 
@@ -279,7 +294,7 @@ class Ldap
 				}
 
 				if (!$connected) {
-					$this->close();
+					$this->unbind();
 				}
 			}
 		}
diff --git a/htdocs/core/login/functions_ldap.php b/htdocs/core/login/functions_ldap.php
index 2d55ca2815b..5ae3af3f008 100644
--- a/htdocs/core/login/functions_ldap.php
+++ b/htdocs/core/login/functions_ldap.php
@@ -181,7 +181,7 @@ function check_user_password_ldap($usertotest, $passwordtotest, $entitytotest)
 				}
 
 				// ldap2dolibarr synchronisation
-				if ($login && !empty($conf->ldap->enabled) && $conf->global->LDAP_SYNCHRO_ACTIVE == 'ldap2dolibarr') {	// ldap2dolibarr synchronisation
+				if ($login && !empty($conf->ldap->enabled) && $conf->global->LDAP_SYNCHRO_ACTIVE == Ldap::SYNCHRO_LDAP_TO_DOLIBARR) {	// ldap2dolibarr synchronization
 					dol_syslog("functions_ldap::check_user_password_ldap Sync ldap2dolibarr");
 
 					// On charge les attributs du user ldap
diff --git a/htdocs/core/triggers/interface_50_modLdap_Ldapsynchro.class.php b/htdocs/core/triggers/interface_50_modLdap_Ldapsynchro.class.php
index d4db5ebccfc..24df646efd6 100644
--- a/htdocs/core/triggers/interface_50_modLdap_Ldapsynchro.class.php
+++ b/htdocs/core/triggers/interface_50_modLdap_Ldapsynchro.class.php
@@ -81,7 +81,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 		// Users
 		if ($action == 'USER_CREATE') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && $conf->global->LDAP_SYNCHRO_ACTIVE === 'dolibarr2ldap') {
+			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -98,7 +98,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'USER_MODIFY') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && $conf->global->LDAP_SYNCHRO_ACTIVE === 'dolibarr2ldap') {
+			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -177,7 +177,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'USER_NEW_PASSWORD') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && $conf->global->LDAP_SYNCHRO_ACTIVE === 'dolibarr2ldap') {
+			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -212,7 +212,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
 		} elseif ($action == 'USER_DELETE') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && $conf->global->LDAP_SYNCHRO_ACTIVE === 'dolibarr2ldap') {
+			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -229,7 +229,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 			/*} elseif ($action == 'USER_SETINGROUP') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && $conf->global->LDAP_SYNCHRO_ACTIVE === 'dolibarr2ldap') {
+			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -263,7 +263,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 			} elseif ($action == 'USER_REMOVEFROMGROUP') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && $conf->global->LDAP_SYNCHRO_ACTIVE === 'dolibarr2ldap') {
+			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -298,7 +298,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 		} elseif ($action == 'USERGROUP_CREATE') {
 			// Groupes
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && $conf->global->LDAP_SYNCHRO_ACTIVE === 'dolibarr2ldap') {
+			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -320,7 +320,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'USERGROUP_MODIFY') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && $conf->global->LDAP_SYNCHRO_ACTIVE === 'dolibarr2ldap') {
+			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -353,7 +353,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'USERGROUP_DELETE') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && $conf->global->LDAP_SYNCHRO_ACTIVE === 'dolibarr2ldap') {
+			if (!empty($conf->global->LDAP_SYNCHRO_ACTIVE) && getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -439,7 +439,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 		} elseif ($action == 'MEMBER_CREATE') {
 			// Members
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == '1') {
+			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && $conf->global->LDAP_MEMBER_ACTIVE == Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -450,7 +450,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 					$result = $ldap->add($dn, $info, $user);
 
 					// For member type
-					if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && (string) $conf->global->LDAP_MEMBER_TYPE_ACTIVE == '1') {
+					if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && getDolGlobalInt('LDAP_MEMBER_TYPE_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 						if ($object->typeid > 0) {
 							require_once DOL_DOCUMENT_ROOT."/adherents/class/adherent_type.class.php";
 							$membertype = new AdherentType($this->db);
@@ -482,7 +482,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'MEMBER_VALIDATE') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == '1') {
+			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				// If status field is setup to be synchronized
 				if (!empty($conf->global->LDAP_FIELD_MEMBER_STATUS)) {
 					$ldap = new Ldap();
@@ -503,7 +503,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'MEMBER_SUBSCRIPTION') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == '1') {
+			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				// If subscriptions fields are setup to be synchronized
 				if ($conf->global->LDAP_FIELD_MEMBER_FIRSTSUBSCRIPTION_DATE
 					|| $conf->global->LDAP_FIELD_MEMBER_FIRSTSUBSCRIPTION_AMOUNT
@@ -528,7 +528,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'MEMBER_MODIFY') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == '1') {
+			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -557,7 +557,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 					$result = $ldap->update($dn, $info, $user, $olddn, $newrdn, $newparent);
 
 					// For member type
-					if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && (string) $conf->global->LDAP_MEMBER_TYPE_ACTIVE == '1') {
+					if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && getDolGlobalInt('LDAP_MEMBER_TYPE_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 						require_once DOL_DOCUMENT_ROOT."/adherents/class/adherent_type.class.php";
 
 						/*
@@ -616,7 +616,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'MEMBER_NEW_PASSWORD') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == '1') {
+			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				// If password field is setup to be synchronized
 				if ($conf->global->LDAP_FIELD_PASSWORD || $conf->global->LDAP_FIELD_PASSWORD_CRYPTED) {
 					$ldap = new Ldap();
@@ -637,7 +637,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'MEMBER_RESILIATE') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == '1') {
+			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				// If status field is setup to be synchronized
 				if (!empty($conf->global->LDAP_FIELD_MEMBER_STATUS)) {
 					$ldap = new Ldap();
@@ -658,7 +658,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'MEMBER_DELETE') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == '1') {
+			if (!empty($conf->global->LDAP_MEMBER_ACTIVE) && (string) $conf->global->LDAP_MEMBER_ACTIVE == Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -669,7 +669,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 					$result = $ldap->delete($dn);
 
 					// For member type
-					if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && (string) $conf->global->LDAP_MEMBER_TYPE_ACTIVE == '1') {
+					if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && getDolGlobalInt('LDAP_MEMBER_TYPE_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 						if ($object->typeid > 0) {
 							require_once DOL_DOCUMENT_ROOT."/adherents/class/adherent_type.class.php";
 
@@ -706,7 +706,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 		} elseif ($action == 'MEMBER_TYPE_CREATE') {
 			// Members types
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && (string) $conf->global->LDAP_MEMBER_TYPE_ACTIVE == '1') {
+			if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && getDolGlobalInt('LDAP_MEMBER_TYPE_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -728,7 +728,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'MEMBER_TYPE_MODIFY') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && (string) $conf->global->LDAP_MEMBER_TYPE_ACTIVE == '1') {
+			if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && getDolGlobalInt('LDAP_MEMBER_TYPE_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
@@ -765,7 +765,7 @@ class InterfaceLdapsynchro extends DolibarrTriggers
 			}
 		} elseif ($action == 'MEMBER_TYPE_DELETE') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
-			if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && (string) $conf->global->LDAP_MEMBER_TYPE_ACTIVE == '1') {
+			if (!empty($conf->global->LDAP_MEMBER_TYPE_ACTIVE) && getDolGlobalInt('LDAP_MEMBER_TYPE_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 				$ldap = new Ldap();
 				$result = $ldap->connect_bind();
 
diff --git a/htdocs/langs/en_US/ldap.lang b/htdocs/langs/en_US/ldap.lang
index b13e454159d..19dd29e0a51 100644
--- a/htdocs/langs/en_US/ldap.lang
+++ b/htdocs/langs/en_US/ldap.lang
@@ -26,4 +26,6 @@ ForceSynchronize=Force synchronizing Dolibarr -> LDAP
 ErrorFailedToReadLDAP=Failed to read LDAP database. Check LDAP module setup and database accessibility.
 PasswordOfUserInLDAP=Password of user in LDAP
 LDAPPasswordHashType=Password hash type
-LDAPPasswordHashTypeExample=Type of password hash used on the server
\ No newline at end of file
+LDAPPasswordHashTypeExample=Type of password hash used on the server
+SupportedForLDAPExportScriptOnly=Only supported by an ldap export script
+SupportedForLDAPImportScriptOnly=Only supported by an ldap import script
\ No newline at end of file
diff --git a/htdocs/user/card.php b/htdocs/user/card.php
index e3a72384050..da4cbf5fac0 100644
--- a/htdocs/user/card.php
+++ b/htdocs/user/card.php
@@ -731,7 +731,7 @@ if ($action == 'create' || $action == 'adduserldap') {
 	print "<br>";
 
 
-	if (!empty($conf->ldap->enabled) && (isset($conf->global->LDAP_SYNCHRO_ACTIVE) && $conf->global->LDAP_SYNCHRO_ACTIVE == 'ldap2dolibarr')) {
+	if (!empty($conf->ldap->enabled) && (isset($conf->global->LDAP_SYNCHRO_ACTIVE) && getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_LDAP_TO_DOLIBARR)) {
 		// Show form to add an account from LDAP if sync LDAP -> Dolibarr is set
 		$ldap = new Ldap();
 		$result = $ldap->connect_bind();
diff --git a/htdocs/user/group/ldap.php b/htdocs/user/group/ldap.php
index d8d1995a847..e3a01f27731 100644
--- a/htdocs/user/group/ldap.php
+++ b/htdocs/user/group/ldap.php
@@ -147,13 +147,13 @@ print dol_get_fiche_end();
  */
 print '<div class="tabsAction">';
 
-if ($conf->global->LDAP_SYNCHRO_ACTIVE == 'dolibarr2ldap') {
+if (getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 	print '<a class="butAction" href="'.$_SERVER["PHP_SELF"].'?id='.$object->id.'&amp;action=dolibarr2ldap">'.$langs->trans("ForceSynchronize").'</a>';
 }
 
 print "</div>\n";
 
-if ($conf->global->LDAP_SYNCHRO_ACTIVE == 'dolibarr2ldap') {
+if (getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 	print "<br>\n";
 }
 
diff --git a/htdocs/user/ldap.php b/htdocs/user/ldap.php
index 8e12bf1b461..66199e9b3f6 100644
--- a/htdocs/user/ldap.php
+++ b/htdocs/user/ldap.php
@@ -153,13 +153,13 @@ print dol_get_fiche_end();
  */
 print '<div class="tabsAction">';
 
-if ($conf->global->LDAP_SYNCHRO_ACTIVE == 'dolibarr2ldap') {
+if (getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 	print '<a class="butAction" href="'.$_SERVER["PHP_SELF"].'?id='.$object->id.'&amp;action=dolibarr2ldap">'.$langs->trans("ForceSynchronize").'</a>';
 }
 
 print "</div>\n";
 
-if ($conf->global->LDAP_SYNCHRO_ACTIVE == 'dolibarr2ldap') {
+if (getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') === Ldap::SYNCHRO_DOLIBARR_TO_LDAP) {
 	print "<br>\n";
 }