beppo

Hi,
we have a parent domain with 13 child domains.
during the last time I find more and more child domain users with the wrong
domain name in their fqdn.
for example: the parent domain is microsoft.com, the child - domain is
ibm.microsoft.com and so on. Some admins don´t pay attention when they create
new users, and don´t select the proper child domain in the field "user logon
name".
What I would like to know: Is there a chance to set this by default to the
given child domain? So if a local admin creates the local user, automatically
the child domain is chosen? Is there a trick with adsi edit or so?