Samba ACL support is a feature that enables the manipulation
of UNIX file permissions or UNIX ACLs from Windows NT/XP/2000 clients.
With this feature, almost any modification you want to make
to UNIX permissions or VxFS POSIX ACLs can now be done from an NT/XP/2000 client
(with the exception of the class entry for
VxFS POSIX ACLs).
Windows applications running on the Windows NT/XP/2000 client cannot
expect full NT/XP/2000 ACL support. Although much of the NT/XP/2000
ACL information is retained and retrieved by the Samba server, some
of the information may be lost or changed in some cases.
The ACL support is not an NT/XP/2000 ACL emulation, but rather access
to UNIX ACLs through the NT/XP/2000 client. Therefore you cannot
run Windows applications which require full, perfect NT/XP/2000 ACL
support.