ansible/roles/matrix_synapse/templates/matrix-synapse/conf.d/password_providers.yaml.j2

# {{ ansible_managed }}
password_providers:
 - module: "ldap_auth_provider.LdapAuthProvider"
   config:
     enabled: true
     uri: "ldap://{{ ldap_master_ipv4 }}:389"
     base: "{{ ldap_user_tree }}"
     attributes:
        uid: "uid"
        mail: "mail"
        name: "uid"
     bind_dn: "{{ ldap_matrix_bind_dn }}"
     bind_password: "{{ ldap_matrix_password }}"