###BeginCaseStudy###
Topic 7, Contoso, Ltd Case D
Overview
Contoso, Ltd., is a manufacturing company that makes several different components that are used in
automobile production. Contoso has a main office in Detroit, a distribution center in Chicago, and
branch offices in Dallas, Atlanta, and San Diego.
The contoso.com forest and domain functional level are Windows Server 2008 R2. All servers run
Windows Server 2012 R2, and all client workstations run Windows 7 or Windows 8. Contoso uses
System Center 2012 Operations Manager and Audit Collection Services (ACS) to monitor the
environment. There is no certification authority (CA) in the environment.
Current Environment
The contoso.com domain contains the servers as shown in the following table:

Contoso sales staff travel within the United States and connect to a VPN by using mobile devices to
access the corporate network. Sales users authenticate to the VPN by using their Active Directory
usernames and passwords. The VPN solution also supports certification-based authentication.
Contoso uses an inventory system that requires manually counting products and entering that count
into a database. Contoso purchases new inventory software that supports wireless handheld scanners
and several wireless handheld scanners. The wireless handheld scanners run a third party operating
system that supports the Network Device Enrollment Service (NDES).
Business Requirements
Security
The wireless handheld scanners must use certification-based authentication to access the wireless
network.
Sales users who use mobile devices must use certification-based authentication to access the VPN.
When sales users leave the company, Contoso administrators must be able to disable their VPN access
by revoking their certificates.
Monitoring
All servers must be monitored by using System Center 2012 Operating Manager. In addition to
monitoring the Windows operating system, you must collect security logs from the CA servers by using
ACS, and monitor the services that run on the CA and Certificate Revocation List (CRL) servers, such as
certification authority and web services.
Technical Requirements
CA Hierarchy
Contoso requires a two-tier CA hierarchy. The CA hierarchy must include a stand-alone offline root and
two Active Directory-integrated issuing CAs: one for issuing certificates to domain-joined devices, and
one for issuing certificates to non-domain-joined devices by using the NDES. CRLs must be published to
two web servers: one in Detroit and one in Chicago.
Contoso has servers that run Windows Server 2012 R2 to use for the CA hierarchy. The servers are
described in the following table:

The IT security department must have the necessary permissions to manage the CA and CRL servers. A
domain group named Corp-IT Security must be used for this purpose. The IT security department users
are not domain admins.
Fault Tolerance
The servers that host the CRL must be part of a Windows Network Load Balancing (NLB) cluster. The CRL
must be available to users in all locations by using the hostname crl.contoso.com, even if one of the
underlying web servers is offline.

###EndCaseStudy###

You plan to allow users to run internal applications from outside the company’s network. You have a
Windows Server 2012 R2 that has the Active Directory Federation Services (AD FS) role installed. You
must secure on-premises resources by using multi-factor authentication (MFA). You need to design a
solution to enforce different access levels for users with personal Windows 8.1 or iOS 8 devices.
Solution: You install a local instance of MFA Server. You connect the instance to the Microsoft Azure
MFA provider, and then run the following Windows PowerShell cmdlet.
Enable-AdfsDeviceRegistration
Does this meet the goal?

A.
Yes

B.
No

Explanation:
We must install AD FS Adapter, not register a host for the Device Registration Service.
Note: The Enable-AdfsDeviceRegistration cmdlet configures a server in an Active Directory Federation
Services (AD FS) farm to host the Device Registration Service.
Using Multi-Factor Authentication with Windows Server 2012 R2 AD FS
https://msdn.microsoft.com/en-us/library/azure/dn807157.aspx