diff --git a/N2SNUserTools/cli.py b/N2SNUserTools/cli.py
index 0b0de2f..a7a94af 100644
--- a/N2SNUserTools/cli.py
+++ b/N2SNUserTools/cli.py
@@ -321,7 +321,8 @@ def n2sn_search_user():
         common_config['server'],
         common_config['group_search'].strip('"'),
         common_config['user_search'].strip('"'),
-        args.surname, args.givenname, args.type
+        args.surname, args.givenname, args.type,
+        ca_certs_file=common_config.get('ldap_ca_cert', None),
     )
 
     print(table)
diff --git a/N2SNUserTools/utils.py b/N2SNUserTools/utils.py
index b2d92f9..efa0f23 100644
--- a/N2SNUserTools/utils.py
+++ b/N2SNUserTools/utils.py
@@ -89,9 +89,11 @@ def n2sn_list_group_users_as_table(server, group_search, user_search,
 
 
 def n2sn_list_user_search_as_table(server, group_search, user_search,
-                                   surname, givenname, user_type):
+                                   surname, givenname, user_type,
+                                   ca_certs_file):
 
     with ADObjects(server, group_search, user_search,
+                   ca_certs_file=ca_certs_file,
                    authenticate=False) as ad:
         users = ad.get_user_by_surname_and_givenname_dict(
             surname, givenname, user_type