Few days ago, after make an update, i noted that cant SMB don't load, i check the logs and find an extrange error.
The Active Directory Connector was not working, it was unable to find the PDC.
The snbd log says:

[2016/07/18 15:09:11, 0] nmbd/nmbd.c:861(main)

nmbd version 3.6.23-25.el6_7 started.

Copyright Andrew Tridgell and the Samba Team 1992-2011

[2016/07/18 15:09:11, 0] nmbd/asyncdns.c:157(start_async_dns)

started asyncdns process 21460

[2016/07/18 15:09:36, 0] nmbd/nmbd_become_lmb.c:397(become_local_master_stage2)

*****

Samba name server GATEWAY is now a local master browser for workgroup DIGITALIZA on subnet 192.168.0.1

*****

[2016/07/18 15:09:36, 0] nmbd/nmbd_browsesync.c:351(find_domain_master_name_query_fail)

find_domain_master_name_query_fail:

Unable to find the Domain Master Browser name DIGITALIZA<1b> for the workgroup DIGITALIZA.

Unable to sync browse lists in this workgroup.

My SMB conf its

[global]

unix password sync = No

# General

netbios name = Gateway

workgroup = DIGITALIZA

server string = Servidor Gateway

security = ads

realm = digitaliza.com.py

password server = mail.digitaliza.com.py



# Logging

syslog = 0

log level = 1

log file = /var/log/samba/%L-%m

max log size = 0

utmp = Yes



# Network

bind interfaces only = No

interfaces = lo eth1

smb ports = 139



# Printing

printcap name = /etc/printcap

load printers = Yes



# Security settings

guest account = guest

#restrict anonymous = 2



# WINS

wins support = Yes

wins server =



# PDC/BDC

domain logons = No

add machine script = /usr/sbin/samba-add-machine "%u"

logon drive = U:

logon script = logon.cmd

logon path =

logon home = \\%L\%U



# Winbind

idmap config * : backend = rid

idmap config * : range = 20000000-29999999

winbind enum users = Yes

winbind enum groups = Yes

winbind offline logon = false

winbind use default domain = true

winbind separator = +

template homedir = /home/%U

template shell = /sbin/nologin



# Other

preferred master = No

domain master = No

passwd program = /usr/sbin/userpasswd %u

passwd chat = *password:* %n\n *password:* %n\n *successfully.*

passwd chat timeout = 10

username map = /etc/samba/smbusers

wide links = No

allow trusted domains = No



# LDAP settings

# include = /etc/samba/smb.ldap.conf



# Winbind LDAP settings

# include = /etc/samba/smb.winbind.conf

I check connectivity, the server see the PDC. At least whit ping
Another strange error is, try to reconnect whit the ADC but the form seens not to work, i put fake configs and always seens to accept it dont validate and dont writte to SMB config.
I have a ClearOs Professional but no clear care subscription.