Your network consists of an Active Directory forest named contoso.com. Contoso.com has an Exchange Server 2010 organization. 
A subsidiary company has a separate Active Directory forest named fabrikam.com. Fabrikam.com has an Exchange Server 2007 organization. You plan to consolidate both organizations. 
Your companys consolidation strategy includes the following requirements：.Support costs must be minimized
.Mailbox access must be easily shared between users
.All e-mail messages must be hosted on Exchange Server 2010 mailbox servers 
You need to recommend a solution to meet the requirements of the consolidation strategy. 
What should you recommend？（）

Your company has a main office and 10 branch offices. Each office has a direct link to the Internet. 
Each branch office has a WAN link that connects to the main office. Your network consists of an Active Directory forest. Each office is configured as an Active Directory site. 
You plan to deploy an Exchange Server 2010 Hub Transport server in each site. You need to design a message routing solution to meet the following requirements：
.Branch office connections to the Internet must be used to deliver e-mail 
.Branch office servers must use the WAN link to the main office to deliver e-mail to other branch offices.Branch office servers must be prevented from sending e-mail to the Internet by using the WAN link to themain office
.The solution must minimize administrative overhead
What should you include in the solution？（）