diff --git a/cmdb-api/api/models/acl.py b/cmdb-api/api/models/acl.py
index a96bb1c..b0683ec 100644
--- a/cmdb-api/api/models/acl.py
+++ b/cmdb-api/api/models/acl.py
@@ -74,6 +74,8 @@ class UserQuery(BaseQuery):
 
             conn = Connection(server, user=who, password=password)
             conn.bind()
+            if conn.result['result'] != 0:
+                raise LDAPBindError
             conn.unbind()
 
             if not user: