Do you want to use your portal from your Treo or other web-enabled Palm device?
If you have a single domain, it usually isn't an issue, just set your default realm in IIS and rock on.
But, if you have multiple domains and your 'keyboard only' palm doesn't have a \ (What was Palm thinking?) you will be unable
to enter your domain\username.
You need to use the UPN, e.g. bencurry@myportal.foo
-ben