samba - Oct 2009 - Don't see a subdomain as subdomain

Hello,

we have an Domain-Setup with three domains and an forest-trust between
the domains. All domaincontrollers are Windows 2003 Server. The setup of
the Forest-Trusts are identically (as the DC-Admin says).

                Under-A (where the samba server lives)
              /
         Domain-A
           /   \
          /     \
    Domain-B   Domain-C
                    \
                    Under-C 


When I use wbinfo -m --verbose I see the folowing:
Domain Name     DNS Domain              Trust Type  Transitive  In   Out
BUILTIN                                 None        Yes         Yes  Yes
[Server]                                None        Yes         Yes  Yes
Under-A         Under-A.Domain-A.net    None        Yes         Yes  Yes
Domain-A        Domain-A.net            In-Forest   Yes         Yes  Yes
Domain-C        Domain-C.net            None        Yes         Yes  Yes
Domain-B        Domain-B.com            Forest      Yes         Yes  Yes

As you can see, wbinfo says, that the trust to "Domain-C" is no
forest-Trust and I also do'nt see the subdomain "Under-C". 

With debug-level 10 I see the following information from my
"Domain-A"-DC ("log.wb-Domain-A"):

(...)
                              array: struct netr_DomainTrust
                                  netbios_name             : *
                                      netbios_name             :
'Domain-C'
                                  dns_name                 : *
                                      dns_name                 :
'Domain-C.net'
                                  trust_flags              : 0x00000022
(34)
                                         0: NETR_TRUST_FLAG_IN_FOREST
                                         1: NETR_TRUST_FLAG_OUTBOUND
                                         0: NETR_TRUST_FLAG_TREEROOT
                                         0: NETR_TRUST_FLAG_PRIMARY
                                         0: NETR_TRUST_FLAG_NATIVE
                                         1: NETR_TRUST_FLAG_INBOUND
                                  parent_index             : 0x00000000
(0)
                                  trust_type               :
NETR_TRUST_TYPE_UPLEVEL (2)
                                  trust_attributes         : 0x00000048
(72)
                                         0:
NETR_TRUST_ATTRIBUTE_NON_TRANSITIVE
                                         0:
NETR_TRUST_ATTRIBUTE_UPLEVEL_ONLY
                                         0:
NETR_TRUST_ATTRIBUTE_QUARANTINED_DOMAIN
                                         1:
NETR_TRUST_ATTRIBUTE_FOREST_TRANSITIVE
                                         0:
NETR_TRUST_ATTRIBUTE_CROSS_ORGANIZATION
                                         0:
NETR_TRUST_ATTRIBUTE_WITHIN_FOREST
                                         1:
NETR_TRUST_ATTRIBUTE_TREAT_AS_EXTERNAL
                                  sid                      : *
                                      sid                      : [SID]
                                  guid                     :
00000000-0000-0000-0000-000000000000

                              array: struct netr_DomainTrust
                                  netbios_name             : *
                                      netbios_name             :
'Domain-B'
                                  dns_name                 : *
                                      dns_name                 :
'AD.Domain-B.COM'
                                  trust_flags              : 0x00000022
(34)
                                         0: NETR_TRUST_FLAG_IN_FOREST
                                         1: NETR_TRUST_FLAG_OUTBOUND
                                         0: NETR_TRUST_FLAG_TREEROOT
                                         0: NETR_TRUST_FLAG_PRIMARY
                                         0: NETR_TRUST_FLAG_NATIVE
                                         1: NETR_TRUST_FLAG_INBOUND
                                  parent_index             : 0x00000000
(0)
                                  trust_type               :
NETR_TRUST_TYPE_UPLEVEL (2)
                                  trust_attributes         : 0x00000008
(8)
                                         0:
NETR_TRUST_ATTRIBUTE_NON_TRANSITIVE
                                         0:
NETR_TRUST_ATTRIBUTE_UPLEVEL_ONLY
                                         0:
NETR_TRUST_ATTRIBUTE_QUARANTINED_DOMAIN
                                         1:
NETR_TRUST_ATTRIBUTE_FOREST_TRANSITIVE
                                         0:
NETR_TRUST_ATTRIBUTE_CROSS_ORGANIZATION
                                         0:
NETR_TRUST_ATTRIBUTE_WITHIN_FOREST
                                         0:
NETR_TRUST_ATTRIBUTE_TREAT_AS_EXTERNAL
                                  sid                      : *
                                      sid                      : [SID]
                                  guid                     :
00000000-0000-0000-0000-000000000000
(...)

What is interesting above is the
"NETR_TRUST_ATTRIBUTE_TREAT_AS_EXTERNAL"-flag which is "1"
on the first
anf "0" on the second trust-Entry. Could someone tell me what this
flag
means?

After a  while (few hours or one day) wbinfo says the following:

Domain Name     DNS Domain              Trust Type  Transitive  In   Out
BUILTIN                                 None        Yes         Yes  Yes
[Server]                                None        Yes         Yes  Yes
Under-A         Under-A.Domain-A.net    None        Yes         Yes  Yes
Domain-A        Domain-A.net            In-Forest   Yes         Yes  Yes
Domain-C        Domain-C.net            None        Yes         Yes  Yes
Domain-B        Domain-B.com            Forest      Yes         Yes  Yes
Under-C                                 None        Yes         No   Yes

The subdomain "Under-C" is visible but not as subdomain or
forest-trust
and also there is no log-entry for this domain like above in any
logfile. But there is an logfile "log.wb-Under-C". There is no logfile
like "log.wb-Domain-C".

The SAMBA is an Samba 3.3.9 under Solaris 9.
Samba-Config:
[global]
   workgroup = Under-A
   server string = Samba Server ditgwd
   netbios name = [Server]
   security = ads
   realm = Under-A.Domain A.NET
   encrypt passwords = yes
   map to guest = never
   load printers = no
   interfaces = [One IP]
   bind interfaces only = yes
   use spnego                      = yes
   encrypt passwords               = yes
   invalid users                   = root Administrator admin oracle
bgdft
   name resolve order = host
   log file = /var/opt/log/samba/log.%m
   max log size = 5000
   password server = *
   passdb backend  = tdbsam
   socket options  = IPTOS_LOWDELAY TCP_NODELAY
   server schannel = auto
   template shell  = /usr/bin/false
   client schannel = no
   local master = no
   os level = 1
   domain master = no
   preferred master = no
   domain logons = no
   wins support = no
   wins proxy = no
   dns proxy = no
   allow trusted domains = yes

   winbind separator = +
   idmap uid = 10000-30000
   idmap gid = 10000-30000
   winbind enum users = yes
   winbind enum groups = yes
   winbind use default domain = no
   winbind cache time = 100
   winbind nested groups = yes
   template homedir = /home/%D/%U
   template shell = /usr/bin/false

   log level = 10
#============================ Share Definitions
=============================(...)

The Problem is, that the domain "Under-C" appears only after a while
and
not as subdomain.
Thanks for help in advance,
Ralf