Warning: User Private Group Problems
Windows does not permit user and group accounts to have the same name.
This has serious implications for all sites that use private group accounts.
A private group account is an administrative practice whereby users are each
given their own group account. Red Hat Linux, as well as several free distributions
of Linux, by default create private groups.
When mapping a UNIX/Linux group to a Windows group account, all conflict can
be avoided by assuring that the Windows domain group name does not overlap
with any user account name.