Your company has a main office and 50 branch offices. Each office is configured as an Active Directory site. Each branch office site contains a domain controller.
The main office site contains all the global catalog servers in the forest. Each branch office contains a WAN link that connects to the main office.
You need to plan the deployment of new Mailbox servers to meet the following requirements:
.Ensure that users in the branch offices can access their mailboxes if their local domain controller fails.Deploy the minimum number of Exchange servers
What should you include in the plan?()