About GitLab's Ldap synchronization

Question

I'm using Docker's GitLab CE and Docker's Ldap (389ds). I want these to be LDAP synchronized. Currently, users created in LDAP can log in with GitLab. However, users created in GitLab are not reflected in LDAP. Are these correct?

I watched it for a day. no change.

Edited gitlab.rb. gitlab_rails['ldap_sync_worker_cron'] = "*/3 * * * *"

no change.