diff --git a/apps/users/tasks.py b/apps/users/tasks.py
index 16f208fbd..e0051e939 100644
--- a/apps/users/tasks.py
+++ b/apps/users/tasks.py
@@ -2,6 +2,7 @@
 #
 
 from celery import shared_task
+from django.conf import settings
 
 from ops.celery.utils import create_or_update_celery_periodic_tasks
 from ops.celery.decorator import after_app_ready_start
@@ -11,7 +12,6 @@ from .utils import (
     send_password_expiration_reminder_mail, send_user_expiration_reminder_mail
 )
 from settings.utils import LDAPUtil
-from django.conf import settings
 
 
 logger = get_logger(__file__)
diff --git a/config_example.yml b/config_example.yml
index 2008ff917..911e7b8ee 100644
--- a/config_example.yml
+++ b/config_example.yml
@@ -72,6 +72,13 @@ REDIS_PORT: 6379
 # RADIUS_PORT: 1812
 # RADIUS_SECRET: 
 
+# LDAP/AD 设置定时同步参数
+# 启用/禁用
+# AUTH_LDAP_SYNC_IS_PERIODIC: True
+# 单位: 时
+# AUTH_LDAP_SYNC_INTERVAL: 12
+# Crontab 表达式
+# AUTH_LDAP_SYNC_CRONTAB: * 6 * * *
 
 # OTP settings
 # OTP/MFA 配置