[Samba]3.0.20b map domain user to everyone

[scot eckel]

Hi all, 

I'd like to know that whether it is possible to map domain user to Everyone 
and preserve ACL information when "xcopy /O /K" files from window client to 
samba. Both samba server and windows client have joined Active Directory.
It seems that username map won't work since Everyone is a special group 
rather than user in the domain.

eg:
Source:
Windows 2k3
test.txt 
ACL:
Owner: Domain\user A    Full Access

Destination:
Samba server
test.txt
ACL:
Owner: Everyone    Full Access

Any clue is welcome. 

Best Regards

nelson