Your network contains an Active Directory domain named contoso.com. You have an
Exchange Server 2010 Service Pack 1 (SP1) organization.
External users access their email by using Outlook Web App.
You need to ensure that the external users can log on to Outlook Web App without
specifying a domain name.
Which cmdlet should you use?

A.
New-OwaMailboxPolicy

B.
Set-OwaVirtualDirectory

C.
Set-OrganizationConfig

D.
New-OrganizationRelationship

Explanation:
Set-OWAVirtualDirectory -Identity “owa (default web site)” -LogonFormat username –
DefaultDomain www.contoso.com