###BeginCaseStudy###
Testlet 1
Topic 2, Contoso Ltd
Overview
General Overview
Contoso, Ltd., is a scientific research and supply company that has offices along the east coast of
North America. The company recently completed an upgrade to Exchange Server 2013.
Physical Locations
The company has three sales offices and a research office. The sales offices are located in
Atlanta, New York, and Montreal. The research office is located in Miami.
Existing Environment
Existing Environment
Active Directory Environment
The network contains one Active Directory forest named contoso.com. The Miami office has its own domain
named research.contoso.com.
Each office is configured as an Active Directory site. Each site contains two domain controllers that run
Windows Server 2008 R2 x64. All of the FSMO roles for contoso.com are owned by a domain controller in the
New York site. All of the FSMO roles for the research.contoso.com domain are owned by a domain controller in
the Miami site.
One domain controller in each site is configured as a global catalog server. All of the domain controllers are
configured as DNS servers.
The functional level of the forest and domains is Windows Server 2008 R2.
Network Infrastructure
All client computers are configured to connect to the DNS servers in their respective office only.
Contoso.com has a standalone certification authority (CA) on a server that runs Windows Server 2008 R2.
All offices connect to the New York office by using a high-speed WAN link.
Email Infrastructure
The Exchange Server 2013 organization contains four servers in the New York office. The servers are
configured as shown in the following table.
All external access for the contoso.com organization is provided through an Internet link at the New York office.
Load balancing is provided by using DNS round robin. All inbound and outbound email for the domain is routed
through a mail appliance in the New York office.The Exchange Server 2013 organization contains four servers in the Atlanta office. The servers are configured
as shown in the following table.
The file share witness for NY-DAG is on a file server in the Atlanta office.
The Exchange Server 2013 organization contains two servers in the Montreal office and two servers in the
Miami office. The servers are configured as shown the following table.
All external access to the organization of the research.contoso.com domain is provided through the Internet link
at the Miami office. Load balancing is provided by using DNS round robin. All inbound and outbound email for
the domain goes through an email appliance in the Miami office.
All Exchange Server 2013 servers run Windows Server 2012 Standard.
All users have Windows Phone devices that connect to the Exchange organization by using Exchange
ActiveSync.
User Issues
You discover the following user issues:
Some users report that, intermittently, they fail to connect to their email from their Windows Phone device.
Some users from the New York office report that some searches from Outlook Web App return incomplete
results.
Some of the users in each office report that they fail to access their mailbox during the maintenance period
of the Active Directory domain controllers.
You verify that all of the remote users can connect to the network successfully by using a VPN connection, and
can then launch Outlook successfully.
Partnerships
Contoso recently entered into a partnership with a company named A. Datum Corporation. A Datum has a main office and four branch offices. The main office is located in Toronto.
A Datum has a messaging infrastructure configured as shown in the following table.
Requirements
Planned Changes
Contoso plans to deploy a hardware load balancer in the New York office. The load balancer must bridge all
SSL connections to the Exchange servers.
You plan to deploy two new Exchange Server 2013 servers in a virtual server environment in the Miami office.
The servers will host a few mailboxes as part of an evaluation of resource utilization for virtualized Exchange
servers.
You also plan to deploy a high availability solution for Mailbox servers in the
You plan to replace the email appliance in New York because of recent power outages.
Business Requirements
Contoso identifies the following business requirements:
Minimize the hardware costs required for a load balancing solution.
Minimize the software costs required for a load balancing solution.
Minimize user interruptions if a service fails on a Mailbox server.
Minimize user interruptions if a service fails on a Client Access server.
###EndCaseStudy###
HOTSPOT
You are evaluating a DAG design for the New York and Atlanta offices.You need to ensure that all of the users in the New York and Atlanta offices can access their mailbox if the
WAN link fails.
Which DAG design should you deploy?
To answer, select the appropriate DAG design in the answer area.
Hot Area:
Answer: 
Explanation:
Need to evaluate the placement of the File share witness for even amount of nodes and when the WAN link
fails.
NOT FIGURE 1
If the WAN link fails New York has no access to the File Share Witness
NOT FIGURE 2
If the WAN link fails New York and Atlanta has no access to the File Share Witness
NOT FIGURE 4
If the WAN link fails New York and Atlanta has no access to the File Share Witness
FIGURE 3
If the WAN link fails New York and Atlanta still have access to at least one of the File Share Witnesses.