Dear list! I am running samba4 on my Ubuntu 11.04 machine with the version:4.0.0~alpha15~git20110124.dfsg1-2ubuntu1 Domain joining works fine. I installed the Admin-Tools on my Win7 64bit machine and was able to add users to the Server. After a restart of the client I am not able to start dsa.msc again. The error says: The RPC server is unavailable. I tried to restart the server and client but the problem still existed. After I remove the client and rejoined it to the domain it once worked again. After a reboot of the client the same problem occurs again. The logs do not state any errors. Is this a known bug? I couldn?t find anything in the mailing list archive, br, Chris