DFS Namespace: Change domain part in link.

Hi !

I've got a question about the domain-name part of the Namespace link. (Windows Server 2008 R2)

For a task we had, I made 2 virtual machines.

1 Domain Controller & 1 DFS Server. On both machines we shared 2 folders.

On the DFS Server I made a Namespace where the 4 Shared folders (both servers) are in located.

Works perfect...

The Namespace link is reachable via \\test.local\shares

But.... It should be reachable via \\test.com\shares

I think I need to do some steps in the DNS Manager? 

Can someone help me please?

Thanks !!!!!