[Samba] Sysvol issues after DC migration

Rowland penny rpenny at samba.org
Mon Mar 15 17:53:52 UTC 2021

On 15/03/2021 17:32, Oleg Blyahher via samba wrote:
> No, it currently has the gidNumber 544 (checked by running samba-tool 
> group edit Administrators).
> What gid should it have otherwise? Something in the 5000-6000 range?

Perhaps I should have said "does the 'Administrators' group have a 

So, in the Administrators object in AD there is this line:

gidNumber: 544

If so, edit the group again and remove that line, 'Administrators' 
should not have a gidNumber, it just turns 'Administrators' into a 
group. You aare probably now thinking 'What' ? Administrators is a 
group, well yes, but it is a Windows group and Windows groups can 'own' 
things like a user, something that doesn't happen on Unix. To allow this 
on a Samba DC (Administrators has to own things in Sysvol), groups are 
mapped to 'ID_TYPE_BOTH' in idmap.ldb, giving a group a gidNumber breaks 

This applies to all the groups in the 'Well Known SIDs' (basicaly the 
groups created by a provision), apart from Domain Users.


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