diff --git a/extensions/sync_ehr_to_oa/job.py b/extensions/sync_ehr_to_oa/job.py
index fa26b96..64bb9f5 100644
--- a/extensions/sync_ehr_to_oa/job.py
+++ b/extensions/sync_ehr_to_oa/job.py
@@ -29,6 +29,7 @@ _OA_SQLSERVER_JOB_NO_COLUMN = "field0001"
 _OA_SQLSERVER_ID_COLUMN = "id"
 _EHR_RD_ATTR_KEY = "extyfsx_606508_585814777"
 _EHR_HRBP_ID_KEY = "extdyhrbp_606508_1933587232"
+_EHR_DOMAIN_ACCOUNT_KEY = "extADAccountName_606508_511687157"
 
 
 def _cell_value(cell: Any) -> str:
@@ -345,7 +346,7 @@ class SyncEhrToOaFormJob(BaseJob):
         if not app_key or not app_secret:
             raise ValueError("secret_cfg.app_key and secret_cfg.app_secret are required")
 
-        domain_custom_key = str(params.get("domain_account_custom_key") or "").strip() or None
+        domain_custom_key = str(params.get("domain_account_custom_key") or "").strip() or _EHR_DOMAIN_ACCOUNT_KEY
         mobile_custom_key = str(params.get("mobile_phone_custom_key") or "").strip() or None
         verbose_trace = _to_bool_or_none(params.get("verbose_trace"))
         if verbose_trace is None:
@@ -563,7 +564,7 @@ class SyncEhrToOaFormJob(BaseJob):
                     manager = str(manager_member.get("id") or "")
                     manager_show = str(manager_member.get("name") or manager_code)
                     is_leaving = "是" if _date_only(rec.get("lastWorkDate")) else "否"
-                    domain_account = _custom_prop_value(emp.get("customProperties"), domain_custom_key) or str(emp.get("_Name") or "")
+                    domain_account = _custom_prop_value(emp.get("customProperties"), domain_custom_key)
                     logger.info(
                         "EHR 字段预览：job_no=%s company=%s name=%s rd_attr=%s place=%s entry_date=%s leave_date=%s id_number=%s mobile_phone=%s hrbp_id=%s hrbp_show=%s manager_id=%s manager_show=%s is_leaving=%s domain_account=%s",
                         job_no,
@@ -808,7 +809,7 @@ class SyncEhrToOaFormJob(BaseJob):
                 manager = str(manager_member.get("id") or "")
                 manager_show = str(manager_member.get("name") or manager_code)
                 is_leaving = "是" if _date_only(rec.get("lastWorkDate")) else "否"
-                domain_account = _custom_prop_value(emp.get("customProperties"), domain_custom_key) or str(emp.get("_Name") or "")
+                domain_account = _custom_prop_value(emp.get("customProperties"), domain_custom_key)
                 if place_debug_count < 50:
                     logger.info(
                         "工作地点调试：job_no=%s PlaceText=%r place_code=%r chosen=%r",