samba - Apr 2016 - downgrade the Windows Server 2012 schema and run "domain join"

Hi list. 
According to the Samba wiki, in order to join an additional Samba DC: The
forests schema must be maximum at version 47 (Server 2008 R2) .
Then, is impossible to migrate from windows Server 2012/ 2012_R2 to Samba4 ? 
What if I downgrade the schema version? Is that possible? 

Regards, Phil.

On Fri, 2016-04-29 at 12:44 -0400, Felipe_G0NZÁLEZ_SANTIAG0
wrote:
> Hi list. 
> According to the Samba wiki, in order to join an additional Samba DC:
> The forests schema must be maximum at version 47 (Server 2008 R2) . 
> Then, is impossible to migrate from windows Server 2012/ 2012_R2 to
> Samba4 ? 
> What if I downgrade the schema version? Is that possible? 
A migration to Samba4 should work, but replication back may not work.

(I've had a client running in that situation).

To test if a migration will be possible at all, you can run the new
'samba-tool drs clone-dc-database' command.

We continue to find and fix schema bugs - a number have been fixed
recently, or will be fixed soon.

I hope this helps,

Andrew Bartlett

-- 
Andrew Bartlett                       http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba