A company named Contoso, Ltd., has an Exchange Server 2013 organization. The primary SMTP suffix for all users is contoso.com.
A company named Fabrikam, Inc., has an Exchange Server 2010 organization. The primary SMTP suffix for all users is fabrikam.com.
The users in both organizations access their email by using Microsoft Outlook 2010 and Outlook Anywhere. All of the users work from domain-joined client computers that connect to the internal network.
Contoso acquires Fabrikam.
You establish a cross-forest trust between the Contoso forest and the Fabrikam forest.
In fabrikam.com, you create a user named User1. In contoso.com, you create a linked mailbox for User1 and you set the primary SMTP address to [email protected].
User1 reports that Outlook 2010 fails to configure his mail profile automatically. User1 can manually configure his profile and connect to his mailbox.
You need to ensure that users in fabrikam.com can find their mailboxes automatically.
What should you do in contoso.com?