Hi, after compiling the samba4 4.0.3 (latest) source. I'm trying to join an existing W2k3/8 Domain but get the following. root at server:~# klist klist: No credentials cache found (ticket cache FILE:/tmp/krb5cc_0) root at server:~# kinit admin Password for admin at CITY.DOMAIN.ORG: root at server:~# klist Ticket cache: FILE:/tmp/krb5cc_0 Default principal: admin at CITY.DOMAIN.ORG Valid starting Expires Service principal 27/02/2013 14:31 28/02/2013 00:32 krbtgt/CITY.DOMAIN.ORG at CITY.DOMAIN.ORG renew until 28/02/2013 14:31 root at server:~# samba-tool domain join CITY.DOMAIN.ORG MEMBER --realm=CITY.DOMAIN.ORG -U admin at CITY.DOMAIN.ORG Password for [admin at CITY.DOMAIN.ORG]: ERROR(runtime): uncaught exception - samr_Connect failed: NT_STATUS_ACCESS_DENIED File "/usr/lib/python2.7/dist-packages/samba/netcmd/__init__.py", line 175, in _run return self.run(*args, **kwargs) File "/usr/lib/python2.7/dist-packages/samba/netcmd/domain.py", line 545, in run machinepass=machinepass) The admin user has all rights for the active directory and is as well in the domain admins and enterprise admin group. I tried earlier to join the computer with the standard ubuntu samba 4 packages. but it didn't work, so I deleted the computer from ou=Computer in the AD. Any ideas? Best regards Michael Wilke