LDAP configuration via helm chart

Hi,
I’m trying to install a Gitlab CE version on my vm, but no matter what I do I can’t activate the Gitlab LDAP window,


Also After I login in my Gitlab I can see the LDAP button greyed out.

Do I need to have a working LDAP connection for that window to appear?

Config,
My LDAP server is a WIN2012R2, also integrated with a Nexus sonatype instance.

Chart version,
helm list
NAME REVISION UPDATED STATUS CHART APP VERSION NAMESPACE
gitlab 1 Fri Dec 13 14:04:02 2019 DEPLOYED gitlab-2.5.1 12.5.0 default

Chart LDAP config,

ldap:
####prevent the use of LDAP for sign-in via web.
enabled: true
preventSignin: false
servers:
#####‘main’ is the GitLab ‘provider ID’ of this LDAP server
main:
label: LDAP
host: ad2.testdomain.internal
port: 389
uid: sAMAccountName
bind_dn: CN=Users,DC=testdomain,DC=internal
password:
secret: ldap-main-password
key: Administrator
encryption: plain

How do I activate my LDAP settings?

Thanks.

Hi,
Anyone any thoughts?
thanks.