LDAP against Active Directory

I am using active directory to authenticate users. Its connecting fine and I am able to authenticate. However, it seems anyone can login.

My configuration looks like this
search_filter = “(sAMAccount=%s)”
search_base_dns= [“ou=Accounts,dc=saccap,dc=int”]

[server.attributes]
name=“givenName”
surname=“sn”
username=“cn”
member_of = “memberOf”
email = “mail”

[[servers.group_mappings]]
group_dn=“cn=salv,ou=groups,dc=kt,dc=edu”
org_role=“Admin”

[[servers.group_mappings]]
group_dn=“cn=balc,ou=groups,dc=kt,dc=edu”
org_role=“Viewer”

A user not in balc or salv group is still able to see dashboards. I am sing http_proxy authentication.