diff --git a/Products/LDAPMultiPlugins/CHANGES.txt b/Products/LDAPMultiPlugins/CHANGES.txt
index a429ecb..b219e6f 100644
--- a/Products/LDAPMultiPlugins/CHANGES.txt
+++ b/Products/LDAPMultiPlugins/CHANGES.txt
@@ -5,6 +5,8 @@ To see earlier changes please see HISTORY.txt.
 
 2.0 (unreleased)
 ----------------
-
+- Bug: enumerateUsers returned undesired results if an exact match
+  was required since LDAP searches are not case sensitive.
+  (https://bugs.launchpad.net/bugs/585901)
 
 
diff --git a/Products/LDAPMultiPlugins/LDAPMultiPlugin.py b/Products/LDAPMultiPlugins/LDAPMultiPlugin.py
index 84724b2..7123460 100644
--- a/Products/LDAPMultiPlugins/LDAPMultiPlugin.py
+++ b/Products/LDAPMultiPlugins/LDAPMultiPlugin.py
@@ -188,8 +188,12 @@ class LDAPMultiPlugin(LDAPPluginBase):
         if exact_match and (id or login):
             if id:
                 ldap_user = acl.getUserById(id)
+                if ldap_user is not None and ldap_user.getId() != id:
+                    ldap_user = None
             elif login:
                 ldap_user = acl.getUser(login)
+                if ldap_user is not None and ldap_user.getUserName() != login:
+                    ldap_user = None
 
             if ldap_user is not None:
                 qs = 'user_dn=%s' % quote_plus(ldap_user.getUserDN())