[Samba] Unable to join a W2008_R2 as DC

[Marcio Merlone]

Hi,

I am trying to add a Windows server 2008 R2 as a DC on my domain running 
Samba 4.12.1 on Debian Buster. It fails complaining about incompatible 
domain level.

root at sambadc:~/bin# samba-tool domain level show
Domain and forest function level for domain 'DC=example,DC=tld'

Forest function level: (Windows) 2008 R2
Domain function level: (Windows) 2008 R2
Lowest function level of a DC: (Windows) 2008 R2
root at sambadc:~/bin#

Google and this list archive did not help, any hint?

-- 
*Marcio Merlone*