[Samba] Migrate w2k3 single label to samba4

Dania Ramirez Moya dania181087 at gmail.com
Wed Apr 8 13:32:44 MDT 2015

Hi denis:
First of all thank you very much for warning me .I am very grateful that I
did not know these issues.

I will test in a test environment and according to the results 'll
take a decision.
Once again thanks

Best regards

2015-04-08 5:46 GMT-04:00 Denis Cardon <denis.cardon at tranquil-it-systems.fr>

> Hi Dania,
>  Hello thank you for you response:
>> I would not like to give up.I'll try to see if I can change my domain
>> to the correct dns structure , maybe then I could be migrated to
>> samba4
> you can do a domain rename on the win2k3 before switching to samba. But
> then you will have an issue with the AD Epoch [1] as it will be incremented
> to 1, and that is not supported either by samba4 AD right now.
> I had that issue once too. You can fiddle with the ms-DS-ReplicationEpoch
> attribute and switch it back to 0 manually after domain rename, and samba4
> will happily join the domain as a DC. But as Andrew Bartlett pointed in a
> previous post, you may/will run into issues with replication. You may check
> the quote from Andrew in the bugzilla [2]:
> "The initial reaction of my contacts at Microsoft is that removing this
> value would be "catastrophic".  I strongly urge users of Samba and of
> Microsoft AD not to do this.  The reason is that this is a fundamental part
> of the replication state. "
> If you really don't want to give up, and you don't have/need replication
> now and in the future, and your network is not mission critical, and you
> are ready to reprovision the domain and rejoin all the workstation in case
> of issue, then you may try to fiddle with the ms-DS-ReplicationEpoch
> attribute. I once did a win2k3 single label domain rename on a simple
> public library network with 20 workstations before switching to samba4, and
> the samba DC has been running fine for two years. You've been be warned :-)
> Cheers,
> Denis
> [1] https://technet.microsoft.com/en-us/library/aa996670%28v=
> exchg.80%29.aspx
> [2] https://bugzilla.samba.org/show_bug.cgi?id=9500
>> 2015-04-07 13:48 GMT-04:00 Marcel de Reuver <marcel at de.reuver.org>:
>>  Looks like Windows also does not support single label dc's anymore, see
>>> http://support.microsoft.com/en-us/kb/300684 for the details.
>>> So Samba will also not and will give errors......
>>> Regards, Marcel
>>> 2015-04-07 17:15 GMT+02:00 Dania Ramirez Moya <dania181087 at gmail.com>:
>>>  Hello list
>>>> Has someone migrated w2k3 single label dc to samba4?
>>>> I am trying but i get  several errores
>>>> I would appreciate any help
>>>> Best regards
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> --
> Denis Cardon
> Tranquil IT Systems
> Les Espaces Jules Verne, bâtiment A
> 12 avenue Jules Verne
> 44230 Saint Sébastien sur Loire
> tel : +33 (0)
> http://www.tranquil-it-systems.fr

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