I will have 2 sites for my domain in 2 differents city. I will need 2 sites with one DC in each sites. I may use default-first-site for my first site/DC, it just not elegant
I was thinking that Samba4 was compatible with RSAT tools and this is what most admins was using (on the Samba wiki, they recommend to use RSAT).
I'm not sure, but I think I had no problem with Zentyal 3.1 beta. I would need to boot that VM...