DFS mapped drive shows hidden share

We've Windows Server 2008 R2 and configured DFS (let's call DFS$ as example of hidden share name).

We have a logon script mapping a drive X:\ \\DOMAIN\DFS (DFS namespace).

But in some win7 computers the mapped drive in Windows Explorer is showing the name of the hidden share. For example, I open Windows Explorer and I see:

DFS$ (\\DOMAIN\DFS) (X:)

How can I turn off this display of hidden share information in Windows Explorer?