Which two actions will achieve the goal?

###BeginCaseStudy###

Testlet 1
General Overview
Contoso Ltd. is an international manufacturing company that has 30 000 users. Contoso has the following departments: sales, research, marketing, human
resources, executive, manufacturing, and legal. The sales department has 2.000 users. All of the
users in the sales department are located in the United States. The research department has 3.000 users. All of the users in the research department are located in
Europe.
Physical Locations
Contoso has two main offices. The offices are located in Houston and Frankfurt. Each office has 15.000 users. The offices connect to each other by using an MPLS
network. Each office connects directly to the Internet.
Existing Environment
Lync Server Infrastructure
Contoso has a Lync Server 2013 infrastructure that only uses internal instant messaging (IM) and presence. The infrastructure contains a single Enterprise Edition
Front End pool that services all of the users.
Contoso uses a SIP domain ofcontoso.com for all of the users. Client computers have either Microsoft Lync 2010 or Microsoft Lync 2013 installed. Before deploying
Skype for Business Server 2015 and migrating the users, you implement a small pilot project to test the functionality of Skype for Business Server 2015.
Problem Statements
The users in the pilot report that occasionally, they cannot sign in to Skype for Business 2015.
Requirements
Business goal
Contoso plans to upgrade to Skype for Business Server 2015 during the next six months. Contoso must deploy all of theconferencing and edge services. Contoso
must
also configure federation with its parent company, which is named Proseware Inc. Proseware is located in Europe and has a Lync Server 2010 infrastructure
Contoso must minimize hardware and software purchasingcosts. while guaranteeing performance levels for all Skype for Business Server 2015 workloads.
Planned Changes
Contoso plans to implement the following workloads in the Skype for Business Server 2015 deployment:

The FQDNs of the edge services will be configured as shown in the following table.

Technical Requirements
Contoso identifies the following technical requirements for the planned deployment:

Security Requirements
Contoso identifies the following security requirements for the planned deployment:

###EndCaseStudy###

You support a customer whose Skype for Business Server 2015 Enterprise Pool is configured with Enterprise Voice and Dial in Conferencing. You specify a Session
Initiation Protocol (SIP) Uniform Resource Identifier (URI) for the dial-in conferencing phone number.
You discover that the dial-in conference phone number is configured incorrectly.
You need to change the phone number.
Which two actions will achieve the goal? Each correct answer presents a complete solution.

A.
Run the Set-CsDiallnConferencingAccessNumber Skype forBusiness Management Shell cmdlet.

B.
Delete the object and recreate the access number.

C.
Run the New-CsDiallnConferencingDtmfConfiguration Skype for Business Management Shell cmdlet.

D.
Run the Set-CsSipResponseCodeTranslationRule Skype for Business Management Shell cmdlet.