Virtual Server Using username.virtualserver

When logging in via RoundCube or Outlook, I have to type the username.domain. Is there any way around this? And if not, is there a way of configuring Virtualmin so that Outlook can retrieve the mail servers automatically instead of setting them up manually. I need my employees to be able to add their login easily, and this is a hassle.

Thank you,
-Dave

Status: 
Closed (fixed)