[Samba] Functional Levels

[Carlos]

HI!!

I have one question, in samba 4.8.2 , --forest-level and --domain-level 
is worked 2012/2012 R2 ?

samba-tool domain level --help


--forest-level=FOREST_LEVEL
                         The forest function level (2003 | 2008 | 2008_R2 |
                         2012 | 2012_R2)
   --domain-level=DOMAIN_LEVEL
                         The domain function level (2003 | 2008 | 2008_R2 |
                         2012 | 2012_R2)

I see in wiki https://wiki.samba.org/index.php/Raising_the_Functional_Levels

but dont understan....

* Functional level is included for use against Windows, but not 
supported in Samba. Kerberos improvements from Windows Server 2012 and 
2012 R2 are not implemented in Samba.

1° - Dont have Windows Server, samba 4(3 Dcs) is ok up(update) 
FOREST_LEVEL/DOMAIN_LEVEL , 2008 to 2012R2  ? or not recommended ?

2° - Samba with Windows Server 2012 , not work ?

Thanks