[Samba] Samba4 as BDC on a Win2003 AD_PDC

[Daniel ATUALIZEM TENHO NOVO MSN]

HI,
I have a Windows 2003 as AD PDC.
My intention is disable this Windows and use Samba4 instead.

I have compiled Samba 4.1.12  on Debian 7 without problems.

I followed Samba Wiki to Join this machine to Win domain, without to do the Samba4 provision steps, as mentioned.

The join process occurs without errors and all strutcture of Wind2003 was replicated to Samba4. All modifications done on Windows 2003 are updated to Samba 4.

But, using RSAT to conect to Samba4, I can't create or delete new users or groups. I receive this message on RSAT:

"The server is unwilling to process the request"

This is the output on log.samba when I try to create or modify an user by RSAT connected on Samba 4

[2014/10/09 09:36:29.901189,  0] ../source4/dsdb/repl/drepl_ridalloc.c:43(drepl_new_rid_pool_callback)
  ../source4/dsdb/repl/drepl_ridalloc.c:43: RID Manager failed RID allocation - WERR_NO_LOGON_SERVERS - extended_ret[0x0]


And, this message is output on log.samba all the time:

[2014/10/09 09:37:00.527471,  0] ../source4/librpc/rpc/dcerpc_util.c:681(dcerpc_pipe_auth_recv)
  Failed to bind to uuid e3514235-4b06-11d1-ab04-00c04fc2dcd2 for e3514235-4b06-11d1-ab04-00c04fc2dcd2 at ncacn_ip_tcp:e50ee076-7a81-4616-aace-c18b350b7d4d._msdcs.ITEMNT[1025,seal,krb5] NT_STATUS_NO_LOGON_SERVERS

I need a help to solve this issue.

I want to change Wind2003 AD to Samba4 AD by:
1 - using Samba4 as secondary to get all users from Windows;
2 - testing Samba4 to create, modify and delete users, and replicate to Windows 2003;
3 - If step 2 pass, I wanto to "promote" samba 4 as primary DC and turning off Windows 2003;
4 - I will create a new samba4 to use as secondary DC.

Thanks for any help!