Интеграция Samba + PowerBroker (также как LikeWise-Open) не работает

Ubuntu: 12.04 x64
PBIS: Ядро Linux 2.4 / 2.6 64-bit DEB (с сайта BeyondTrust)
Samba: 3.6.3 (из репозитория Ubuntu)

У нас возникают проблемы с интеграцией Samba с PowerBroker (также как PBIS / LikeWise-Open). Мы следовали этим инструкциям:

https://help.ubuntu.com/12.04/serverguide/samba-ad-integration.html

PBIS работает. Пользователи могут подключиться к машине по SSH и TELNET и войти в систему, используя учетные данные AD. Тем не менее, мы не можем заставить SAMBA аутентифицироваться против AD. Вот вывод журнала:

[2013/05/31 09:36:38.385857,  0] rpc_client/cli_pipe_schannel.c:54(get_schannel_session_key_common)
  get_schannel_session_key: could not fetch trust account password for domain 'EXAMPLE'
[2013/05/31 09:36:38.386170,  0] rpc_client/cli_pipe_schannel.c:184(cli_rpc_pipe_open_schannel)
  cli_rpc_pipe_open_schannel: failed to get schannel session key from server DC2.EXAMPLE.COM for domain EXAMPLE.
[2013/05/31 09:36:38.386228,  0] auth/auth_domain.c:193(connect_to_domain_password_server)
  connect_to_domain_password_server: unable to open the domain client session to machine DC2.EXAMPLE.COM. Error was : NT_STATUS_CANT_ACCESS_DOMAIN_INFO.
[2013/05/31 09:36:38.388088,  0] rpc_client/cli_pipe_schannel.c:54(get_schannel_session_key_common)
  get_schannel_session_key: could not fetch trust account password for domain 'EXAMPLE'
[2013/05/31 09:36:38.388378,  0] rpc_client/cli_pipe_schannel.c:184(cli_rpc_pipe_open_schannel)
  cli_rpc_pipe_open_schannel: failed to get schannel session key from server DC2.EXAMPLE.COM for domain EXAMPLE.
[2013/05/31 09:36:38.388435,  0] auth/auth_domain.c:193(connect_to_domain_password_server)
  connect_to_domain_password_server: unable to open the domain client session to machine DC2.EXAMPLE.COM. Error was : NT_STATUS_CANT_ACCESS_DOMAIN_INFO.
[2013/05/31 09:36:38.390201,  0] rpc_client/cli_pipe_schannel.c:54(get_schannel_session_key_common)
  get_schannel_session_key: could not fetch trust account password for domain 'EXAMPLE'
[2013/05/31 09:36:38.390491,  0] rpc_client/cli_pipe_schannel.c:184(cli_rpc_pipe_open_schannel)
  cli_rpc_pipe_open_schannel: failed to get schannel session key from server DC2.EXAMPLE.COM for domain EXAMPLE.
[2013/05/31 09:36:38.390549,  0] auth/auth_domain.c:193(connect_to_domain_password_server)
  connect_to_domain_password_server: unable to open the domain client session to machine DC2.EXAMPLE.COM. Error was : NT_STATUS_CANT_ACCESS_DOMAIN_INFO.
[2013/05/31 09:36:38.390831,  0] auth/auth_domain.c:292(domain_client_validate)

domain_client_validate: сервер паролей домена недоступен.

У кого-нибудь есть идеи, с чего начать?