I have just put in service our first AD member samba server and am replacing, like many of us, samba 2 servers. Our setup is HHS AD tree, with NIH users in ou's under NIH domain and servers in attached division domain (NIA in our case). Our NIH users have no problems so far other than the usual of sites this size. This sounds somewhat similar to what you are asking.
I have not tried to connect from another connected AD domain so that I would traverse 2 trusts. That seems to be your situation as I understand it. Chuck -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/listinfo/samba