Given this explanation http://technet.microsoft.com/library/understanding-active-directory-functional-levels%28v=WS.10%29.aspx how does affect to samba4 functionality increasing the functional level from: Forest function level: (Windows) 2003 Domain function level: (Windows) 2003 Lowest function level of a DC: (Windows) 2008 R2 to Forest function level: (Windows) 2008 R2 Domain function level: (Windows) 2008 R2 Lowest function level of a DC: (Windows) 2008 R2 with the commands samba-tool domain level raise --domain-level=2008_R2 samba-tool domain level raise --forest-level=2008_R2 besides the domain controller operating system mix compatibility? thanks