Sernet is the integrated Samba software: http://www.samba.plus/ Suppose to have everything you need for an AD, currently based on Samba 4.2. For RHEL/Centos, it has to provide its own Kerberos due to the different kerberos used by Redhat vs Samba. This is SUPPOSE to be fixed in Samba 4.3; perhaps this year. It IS available for Centos7-x86_64 at: https://portal.enterprisesamba.com/ But of course no arm builds there. If someone can help me with setting up the build environment, I would take a hack at building for armv7l. I don't know what they have done with the various pieces. I probably could just try for their Samba 4.1 which is the same version in Centos7. Anyone here interested in helping me out on this?