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I have a samba classic domain, called it "DomainA." All domain controllers and servers are running 3.6.25 on Solaris 11. The PDC and BDC use an LDAP backend for unix, samba and idmap data. Member servers use LDAP backend for unix accounts, so the underlying unix and group accounts are consistent. There is a trust relationship with Windows 2008 AD domain

I updated my PDC and BDC to Samba 4.4.7. Compiled from source into /usr/local/samba. On the samba domain controllers "/usr/local/samba/bin/wbinfo -u" shows the local domain users but not the trusted one. Everything indicates trusts are ok # /usr/local/samba/bin/net rpc trustdom list -U Administrator Enter Administrator's password: Trusted domains

I tried recreating the trusts. I start by setting up trusts on Windows side, using Active Directory Domains and Trusts on the DomainB AD server. . I specify the the samba domain (DOMAINB) but before I can even specify trust type or direction I get the following: Cannot continue Trust relationship can not be created… The local security authority is unable to obtain an RPC

I am trying to configuring Samba 4 classic PDC to trust Windows 2012 domain "DomainB" - the PDC is running Windows 2012 but the forest and domain functional levels are still Windows 2008. On the Win 2012 PDC I try to set up an incoming trust, but it fails with "The local security authority is unable to obtain an RPC connection to the active directory domain controller