diff --git a/htdocs/lib/auth.php b/htdocs/lib/auth.php
index c7242fe..adb5242 100644
--- a/htdocs/lib/auth.php
+++ b/htdocs/lib/auth.php
@@ -7,12 +7,18 @@ if (empty($_SESSION['login'])) {
     header("location: auth.php\n\n");
     exit(0);
 } else {
-    if (!$server = new LdapServer($_SESSION['login'])) {
-        print "<div class=\"alert alert-danger\" role=\"alert\">Erreur de connexion LDAP !</div>";
-        exit(1);
-    } else {
+    try {
+        $server = new LdapServer($_SESSION['login']);
         if (!empty($_GET['domain'])) {
-            $domain = new LdapDomain($server, Html::clean($_GET['domain']));
+            try {
+                $domain = new LdapDomain($server, Html::clean($_GET['domain']));
+            } catch (Exception $e_d) {
+                print '<div class="alert alert-danger" role="alert">'.$e_d->getMessage();
+                exit(1);
+            }
         }
+    } catch (Exception $e_s) {
+        print '<div class="alert alert-danger" role="alert">'.$e_s->getMessage().'</div>';
+        exit(1);
     }
 }
diff --git a/htdocs/lib/class.ldapdomain.php b/htdocs/lib/class.ldapdomain.php
index c9e69ec..7964699 100644
--- a/htdocs/lib/class.ldapdomain.php
+++ b/htdocs/lib/class.ldapdomain.php
@@ -11,32 +11,32 @@ class LdapDomain extends LdapServer {
         $this->dn = $server->dn;
 
         $this->domain = $name;
-        $sr = ldap_search($this->conn, "cn=".$this->domain.",".LDAP_BASE, "(ObjectClass=*)");
-        $objects = ldap_get_entries($this->conn, $sr);
+        if ($sr = @ldap_search($this->conn, "cn=".$this->domain.",".LDAP_BASE, "(ObjectClass=*)")) {
+            $objects = ldap_get_entries($this->conn, $sr);
 
-        foreach($objects as $object) {
-            if (!empty($object['objectclass'])) {
-                if (in_array("postfixDomain",$object['objectclass'])) {
-                    $this->active = $object['isactive'][0];
-                }
-                if (in_array("posixAccount",$object['objectclass'])) {
-                    array_push($this->posix_accounts,$object['uid'][0]);
-                }
-                if (in_array("mailAccount",$object['objectclass'])) {
-                    array_push($this->mail_accounts,$object['uid'][0]);
-                }
-                if (in_array("mailAlias",$object['objectclass'])) {
-                    array_push($this->mail_alias,$object['cn'][0]);
-                }
-                if (in_array("sambaSamAccount",$object['objectclass'])) {
-                    array_push($this->smb_accounts,$object['uid'][0]);
+            foreach($objects as $object) {
+                if (!empty($object['objectclass'])) {
+                    if (in_array("postfixDomain",$object['objectclass'])) {
+                        $this->active = $object['isactive'][0];
+                    }
+                    if (in_array("posixAccount",$object['objectclass'])) {
+                        array_push($this->posix_accounts,$object['uid'][0]);
+                    }
+                    if (in_array("mailAccount",$object['objectclass'])) {
+                        array_push($this->mail_accounts,$object['uid'][0]);
+                    }
+                    if (in_array("mailAlias",$object['objectclass'])) {
+                        array_push($this->mail_alias,$object['cn'][0]);
+                    }
+                    if (in_array("sambaSamAccount",$object['objectclass'])) {
+                        array_push($this->smb_accounts,$object['uid'][0]);
+                    }
                 }
             }
+            //$this->quota = getquota($this->domain,'group');
+        } else {
+            throw new Exception("Ce domaine n'existe pas !");
         }
-
-//        $this->quota = getquota($this->domain,'group');
-
-        return $this;
     }
 
     public function getAccounts() {
diff --git a/htdocs/lib/class.ldapserver.php b/htdocs/lib/class.ldapserver.php
index 7312da9..45dc816 100644
--- a/htdocs/lib/class.ldapserver.php
+++ b/htdocs/lib/class.ldapserver.php
@@ -7,12 +7,15 @@ class LdapServer {
     public function __construct($login) {
         global $conf;
         $this->login = $login;
-        $this->conn = ldap_connect(LDAP_URI) or die ("Impossible de se connecter au serveur LDAP ".LDAP_URI);
-        if (!ldap_set_option($this->conn, LDAP_OPT_PROTOCOL_VERSION, 3)) {
-            echo 'Impossible de modifier la version du protocole à 3';
+        if (!$this->conn = ldap_connect(LDAP_URI)) {
+            throw new Exception("Impossible de se connecter au serveur LDPA ".LDAP_URI);
+        }
+        if (!ldap_set_option($this->conn, LDAP_OPT_PROTOCOL_VERSION, 3)) {
+            throw new Exception("Impossible de modifier la version du protocole LDAP à 3");
+        }
+        if (!ldap_bind($this->conn, LDAP_ADMIN_DN, LDAP_ADMIN_PASS)) {
+            throw new Exception("Authentification LDAP échoué !");
         }
-        ldap_bind($this->conn, LDAP_ADMIN_DN, LDAP_ADMIN_PASS) or die ("Authentification LDAP échoué !");
-        
         if (in_array($this->login, $conf['admin']['logins'])) {
             $this->superadmin = true;
         }