To use sssd disabling TLS ( sssd doesn't work without TLS but there is this undocumented option you can use ):

ldap_auth_disable_tls_never_use_in_production = true

In case you get this error:

Attribute 'ldap_auth_disable_tls_never_use_in_production' is not allowed in section

Try running this:

authconfig --enablemkhomedir --enablesssdauth --updateall

The enablemkhomedir is a plus

If when running authconfig your /etc/sssd/sssd.conf gets overwritten, set to no this options: