###BeginCaseStudy###
Topic 3, Contoso Ltd,
Overview General Overview Contoso. Ltd. is an international company that has 3,000 employees.
The company has sales, marketing, research, and human resource departments.
Physical Locations
Contoso has two main offices. The offices are located in New York and Chicago. Each moffice has a data center.
The New York office uses a network subnet of 10.1.0.0/16. The Chicago office uses a mnetwork subnet of
10.128.0.0/16.
The offices connect to each other by using a WAN link. Each office connects directly to the Internet.
Existing Environment
Active Directory The network contains an Active Directory forest named contoso.com. The forest mcontains a
single domain. All domain controllers run Windows Server 2012 R2. The forest mfunctional level is Windows
Server 2012 R2.
The forest contains six domain controllers configured as shown in the following table.
The forest is configured as a single Active Directory site.
Active Directory administrators manage the Active Directory schema. Exchange Server madministrators do not
have access to modify the schema.
Contoso has deployed Active Directory Rights Management Services (AD RMS).
Current Business Model
Contoso partners with a company names Fabrikam. Inc. on manufacturing initiatives. The partnership between
Contoso and Fabrikam requires that both companies share confidentialm information frequently.
Requirements
Business Goals
Contoso plans to install Exchange Server 2016 to provide messaging services for its users.
It must be as easy as possible for the users at Contoso to share free/busy information with mthe users at
Fabrikam.
As much as possible Contoso plans to minimize the costs associated with purchasing hardware and software.
Planned Changes
Contoso plans to implement the following changes before installing Exchange Server 2016:
Install hardware Network Load Balancing (NLB) in the New York and Chicago offices.
Implement Microsoft Office Online Servers in the New York and Chicago offices.
Provide Contoso users with company-approved tablets.
Planned Messaging Infrastructure
You plan to create an Exchange Server 2016 organization named Contoso. You plan to deploy seven servers
that will have Exchange Server 2016 installed. The servers will be configured as mshown in the following table.
All of the servers will be members of a database availability group (DAG) named DAG01.
Client Access Requirements
Contoso identifies the following client access requirements for the planned deployment:
Users must be able to configure their tablet to synchronize email by using Autodiscover.
Users must be able to access the Exchange Server organization by using the following names:
Mail.contoso.com
Autodiscover.contoso.com
Users must be able to access Outlook on the web internally and externally from their tablet.
Users must be able to access Office Online Server by using the URL of office-online.contoso.com.
Security Requirements
Contoso identifies the following security requirements for the planned deployment:
Exchange Server mailbox databases must be encrypted while at rest.
Users must be prevented from using Outlook on the web while they are offline.
Contoso users must be able to share Calendar details with approved external domains only.
Email messages sent to the users in the fabrikam.com SMTP domain must be encrypted automatically.
Whenever possible, client computers must be directed to the same Exchange server for log collection.
Users must be able to access their mailbox by using Exchange ActiveSync on the company approved tablets
only.
Email messages sent from the users in the human resources department of Contoso must be protected by
using AD RMS. regardless of the mail client.
Availability Requirements
Contoso identifies the following high-availability requirements for the planned deployment:
Servers must be able to complete a restart without administrative intervention.
The network load balancer must be able to probe the health of each workload.
If a data center fails, the databases in the other data center must be activated automatically.
Redundant copies of all email messages must exist in the transport pipeline before and after mdelivery.
Email messages must be made highly available by the Exchange Server organization before and after delivery.
If you manually mount the databases following the data center failure, the databases in the failed site must be
prevented from mounting automatically.
###EndCaseStudy###
HOTSPOT
You have an Exchange Server 2016 organization. The Active directory sites are configured as shown in the
following graphic.
Use the drop-down menus to select the answer choice that completes each statement based on the
information presented in the graphic
Answer: 
A message that leaves Site 3 to a destination mailbox in Site 2 will be sent directly to Site 2, because by default all IP site links are transitive.
“It’s important to note that Exchange uses site links when determining the least-cost path, but will always try to deliver messages directly to the destination Exchange server.”
source: https://technet.microsoft.com/en-us/library/jj916681(v=exchg.150).aspx
The correct answer is:
Site 2 (because it’s a hub site)
Site 2 (because it’s the destination and there are no other hub sites between site 3 and site 2)
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on the exam SITE 4 is a also HUB ..so the answer will be site 4 in second answer.
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No, Rambo. If Site4 would be a HUB Site, it still isn’t in least-cost path (20 + 30 > 20 + 10) and message would be send directly to Site2
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Absolutely correct.
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In regards to Marco answer I don’t agreed. Yes, IP site links are transitive but in a full mesh topology. The diagram illustrated in the question seems to reflect a hub topology. Thus, Site 2 would correspond to the first part of the question, and Site 1 would correspond to the second part has it is the least cost routing path.
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That’s very interesting point GRod.. Do we actually know, what is the real network topology. We only see Sites and Site link costs..
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Mail routing
https://technet.microsoft.com/en-us/library/aa998825(v=exchg.160).aspx
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Marco is correct.
https://technet.microsoft.com/en-us/library/jj916681(v=exchg.160)#SiteLinkCost
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Agree with Marco
Site 2 (same cost, but with hub site)
Site 2 (sent directly)
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The presence of one or more hub sites along the least-cost routing path If the least-cost routing path to the primary site contains any hub sites, the message must be routed through the hub sites. The closest hub site along the least-cost routing path is selected as a new delivery group of the type AD site, which includes all transport servers in the hub site. After the message traverses the hub site, routing of the message along the least-cost routing path continues. If the primary site happens to be a hub site, the primary site is still considered a hub site for the following reasons:
If the destination delivery group spans multiple Active Directory sites, the source server should only attempt to connect to the servers in the hub site.
The servers in the hub site that belong to the target delivery group are preferred.
As in previous version of Exchange, hub sites that aren’t in the least-cost routing path to the primary site are ignored.
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I do agree with Macro, In either case it is Site 2.
1- Hubsite in the least cost path, next hop at Site 2 (HubSite), before delivering to Site 4.
2. Hubsite is not in the least cost path, Sent directly to the destination (Site 2). Exchaneg Always try to deliver the message directly to the target Exchange, unless the later is not reachable, in which case the message is queued at the nearest HUB transport server.
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Agree wtih Marco. There are 2 rules to follow:
– If the Hub site is not along the least cost routing path, the message tries to deliver to the Exchange server directly.
– If the target server is not reachable, Exchange tries to deliver the message to the closest destination possible along the least cost routing path.
Based on those 2 rules, the answers are:
1. site2 (the hub site has a link cost of 10, which is the least cost routing path (#1) )
2. site2 (from site 3, neither path are least cost routing paths and hub site is not at the next hop (#1), therefore a direct delivery to site2 is done by Exchange).
Same thing applies to this question:
http://www.aiotestking.com/microsoft/use-the-drop-down-menus-to-select-the-answer-choice-that-completes-each-statement-based-on-2/
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Marco and others are incorrect..
The following figure shows how IP site link costs affect routing to a hub site. In this scenario, Site B has been designated as a hub site. However, Site B doesn’t exist along the least-cost routing path between any other sites. Therefore, messages that are relayed from Site A to Site D are never relayed through Site B. An Active Directory site is never used as a hub site if it isn’t on the least-cost routing path between two other sites.
HUB SERVER HAS TO BE ON LEAST ROUTING COST PATH. Focus people..
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The following figure shows how IP site link costs affect routing to a hub site. In this scenario, Site B has been designated as a hub site. However, Site B doesn’t exist along the least-cost routing path between any other sites. Therefore, messages that are relayed from Site A to Site D are never relayed through Site B. An Active Directory site is never used as a hub site if it isn’t on the least-cost routing path between two other sites.
Site 2:
Site 1:
Is the correct answer
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Help me understand please, why does it have to go through site 1? Even you mentioned that a hub server is not used to route email unless it is on the least costing path.
Site 1 is not a hub site, I don’t see why the email from Site 3 can’t be delivered directly to Site 2, what am I missing?
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By the way, part of that new 104Q 70-345 dumps for your reference:
https://drive.google.com/open?id=0B-ob6L_QjGLpck5vRk5XUVFQb00
Best Regards!
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