[Samba] how to disable homedirs?

[Marco]

Hi,

how can i disable the homedir? 
I have a Domain login configuration, but do not want server based
profiles. After I add a workstation to the domain, the user profiles,
created during the first login of a domain user, on that machine are
always server based. Sure, I can change this profile to a local profile,
but I think I can change this it in the samba configuration, that all
profiles are local.

Marco