Don't do it.
From another post asking the same thing, this is the reply they got form a
MS tech:
"We really would preffer to use FQDN over Single labled. There are
alot of other issues that you can run into when using a Single labeled
domain name with other AD integrated products. Exchange would be a great
example. Also note that the DNR (DNS RESOLVER) was and is designed to
Devolve DNS requests to the LAST 2 names.
Example: Single Labeled domain .domainA
then, you add additional domains on the forest.
child1.domainA
Child2.child1.domainA
If a client in the domain Child2 wants to resolve a name in domainA
Example. Host.DomainA and uses the following to connect to a share
\\host then it is not going to resolve. WHY, because the resolver is
first going to query for first for Host.Child2.child1.domainA, then it
next try HOST.Child1.domainA at that point the Devolution process is
DONE. We only go to the LAST 2 Domain Names.
Also note that if you have a single labeled domain name it causes excess
DNS traffic on the ROOT HINTS servers and being all Good Internet Community
users we definitely do not want to do that. NOTE that in Windows 2003,
you get a big Pop UP Error Message when trying to create a single labeled
name telling you DON'T DO IT. It will still allow you to do it, but you
will still be required to make the registry changes, which is really not
fun.
Microsoft is seriously asking you to NOT do this. We will support you but
it the end results could be limiting as an end results depending on the
services you are using.
Thank you,
Alan Wood[MSFT]"
hth
DDS W 2k MVP MCSE
