GitLab CE + AD: admin_group not working

I just create a GitLab CE 11.8.0 install and configured LDAP authentication with AD. Here is the snippet of the LDAP configuration. Everything appears to be working and I can log in using AD credentials, however the admin_group configuration does not appear to be working. User that belongs to the “GitLab Admin” group are logged in as regular users instead. I do not see any errors in the logs so I am not clear on what it’s not liking.

gitlab_rails['ldap_enabled'] = true
gitlab_rails['ldap_servers'] = YAML.load <<-'EOS'
  main:
    label: 'Domain AD'
    host:  'dc1.domain.com"
    port: 636
    uid: 'sAMAccountName'
    encryption: 'simple_tls'
    verify_certificates: false
    bind_dn: 'ldap_user@domain.com'
    password: 'Password1'
    active_directory: true
    base: 'CN=Users,DC=domain,DC=com'
    group_base: 'OU=GitLab Access,OU=Custom Security Groups,DC=domain,DC=com'
    admin_group: 'GitLab Admin'
EOS

Same thing here!
Everything else is working, but admin_group seems to do nothing at all.
My admin_group is one level below the group_base, but that would be a stupid reason for it not to work. :wink:

Edit:

Both group_base and admin_group configuration options are only available in GitLab Enterprise Edition. See GitLab EE - LDAP Features

Well, that sucks. But it explains this.