Clear your cache folder(moodle_data/cache/*) - had same issue. Resolved.
Made updates via UI and directly through mdl_config_plugins table (value=xxx), refreshing ldap settings page still showed old cached data.
Moodle 2.8.3+
Clear your cache folder(moodle_data/cache/*) - had same issue. Resolved.
Made updates via UI and directly through mdl_config_plugins table (value=xxx), refreshing ldap settings page still showed old cached data.
Moodle 2.8.3+