Hi all, I have two offices connected via a VPN with approximately 200ms latency. About 9 months ago I moved our UK office from a Samba 3 domain to a new Samba 4 domain. At the same time, as a test, I connected up a DC server in India to the same Samba 4 domain, all was good. Roll forwards to two weeks ago, I am starting to push out Samba 4 in India. I hooked up a second server in India (identical hardware/Ubuntu 14.04) and I get an uncaught exception when trying to join the domain: ERROR(exception): uncaught exception - Failed to find a writeable DC for domain I have done a fair bit of fiddling with no joy including demoting the old India server and then attempting to rejoin the domain. This one now also gets the "Failed to find a writeable DC for domain" error so I'm even worse off than before. If I create a DC in the UK office, it joins the domain and functions without any issues. As far as I can tell the domain is functioning normally, it is just not accepting new DCs from the India office. I'm running on Ubuntu 14.04 LTS with the repo Samba version 4.1.6. Any ideas? All I really need is user authentication across sites for about 6 Windows machines, their email is delivered to the UK so having different passwords gets annoying. Regards, Wayne Merricks