--- a/src/pyams_ldap/plugin.py	Fri Apr 27 10:36:33 2018 +0200
+++ b/src/pyams_ldap/plugin.py	Mon Nov 05 16:34:09 2018 +0100
@@ -12,20 +12,16 @@
 
 __docformat__ = 'restructuredtext'
 
-
-# import standard library
-import ldap3
 import logging
 logger = logging.getLogger('PyAMS (ldap)')
 
+import ldap3
 import re
 
-# import interfaces
 from pyams_ldap.interfaces import ILDAPPlugin, ILDAPUserInfo, ILDAPGroupInfo
 from pyams_mail.interfaces import IPrincipalMailInfo
 from zope.intid.interfaces import IIntIds
 
-# import packages
 from beaker.cache import cache_region
 from persistent import Persistent
 from pyams_ldap.query import LDAPQuery
@@ -39,7 +35,6 @@
 
 managers = {}
 
-
 FORMAT_ATTRIBUTES = re.compile("\{(\w+)\[?\d*\]?\}")
 
 
@@ -53,31 +48,24 @@
                                    tls=plugin.use_tls)
         self.bind_dn = plugin.bind_dn
         self.password = plugin.bind_password
-        if plugin.use_pool:
-            self.strategy = ldap3.REUSABLE
-            self.pool_name = 'pyams_ldap:{prefix}'.format(prefix=plugin.prefix)
-            self.pool_size = plugin.pool_size
-            self.pool_lifetime = plugin.pool_lifetime
-        else:
-            self.strategy = ldap3.ASYNC
-            self.pool_name = None
-            self.pool_size = None
-            self.pool_lifetime = None
 
-    def get_connection(self, user=None, password=None):
+    def get_connection(self, user=None, password=None, read_only=True):
         if user:
             conn = ldap3.Connection(self.server,
                                     user=user, password=password,
-                                    client_strategy=ldap3.SYNC,
-                                    auto_bind=True, lazy=False, read_only=True)
+                                    client_strategy=ldap3.ASYNC,
+                                    auto_bind=ldap3.AUTO_BIND_DEFAULT,
+                                    lazy=True,
+                                    read_only=read_only)
         else:
             conn = ldap3.Connection(self.server,
                                     user=self.bind_dn, password=self.password,
-                                    client_strategy=self.strategy,
-                                    pool_name=self.pool_name,
-                                    pool_size=self.pool_size,
-                                    pool_lifetime=self.pool_lifetime,
-                                    auto_bind=True, lazy=False, read_only=True)
+                                    client_strategy=ldap3.REUSABLE,
+                                    auto_bind=ldap3.AUTO_BIND_DEFAULT if self.bind_dn else ldap3.AUTO_BIND_NONE,
+                                    lazy=True,
+                                    read_only=read_only)
+            if conn.auto_bind == ldap3.AUTO_BIND_NONE:
+                conn.open(read_server_info=False)
         return conn
 
 
@@ -178,12 +166,10 @@
     _use_ssl = False
 
     _server_uri = FieldProperty(ILDAPPlugin['server_uri'])
+    use_tls = FieldProperty(ILDAPPlugin['use_tls'])
     bind_dn = FieldProperty(ILDAPPlugin['bind_dn'])
     bind_password = FieldProperty(ILDAPPlugin['bind_password'])
-    use_tls = FieldProperty(ILDAPPlugin['use_tls'])
-    use_pool = FieldProperty(ILDAPPlugin['use_pool'])
-    pool_size = FieldProperty(ILDAPPlugin['pool_size'])
-    pool_lifetime = FieldProperty(ILDAPPlugin['pool_lifetime'])
+
     base_dn = FieldProperty(ILDAPPlugin['base_dn'])
     search_scope = FieldProperty(ILDAPPlugin['search_scope'])