I have a Samba 4 AD domain running with 2 DCs on Centos 6.5, with a named DNS backend. I have multiple Windows 7 machines joined to this domain, which is fine. However, I can't get GPOs to apply. When running gpupdate, I get the following output The processing of Group Policy failed. Windows attempted to read the file \\sysvol\\Policies{31B2F340-016D-11D2-945F-00C04FB984F9}\gpt.ini Obviously, you don't normally see what it's trying to connect to when it's successful, but I would have thought the first place shows up, I should be seeing So, what governs what data gets put in between those angle brackets? If it is just supposed to be the domain, then what else could be going wrong? Thanks in advance for any help.