samba - Jun 2017 - squid_ldap_auth failed with Samba4 AD mode

Hi

I am implementing SQUID with proxy_authentication using module
'squid_ldap_auth'
In my test, using a WINDOWS_SERVER_2008_R2 Active Diretory, the SQUID was
able to authenticate successfully
But using SAMBA_4 Active Directory, the SQUID was unable to authenticate...

Error in squid log:

squid_ldap_auth: WARNING, could not bind to binddn 'Strong(er)
authentication required'
ERR Success


In squid.conf:

auth_param basic program /usr/lib/squid3/./squid_ldap_auth -R -b
dc=samba,dc=int -D squid at samba.int -w password -f sAMAccountName=%s -h
192.168.20.233


In samba.conf:

[global]
workgroup = SAMBA
realm = SAMBA.INT
netbios name = SAMBA4AD
server role = active directory domain controller
dns forwarder = 192.168.20.1

[netlogon]
path = /var/lib/samba/sysvol/samba.int/scripts
read only = No

[sysvol]
path = /var/lib/samba/sysvol
read only = No



Please, how i can solve it?
I believe it is not a problem with Samba, but only some configuration

Thanks,

Anderson Hoffmann