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Microsoft MS-721 Exam
Collaboration Communications Systems Engineer (Page 3 )

Updated On: 1-Feb-2026
Page 3 of 49
PDF with 283 Questions

You have a branch office named Branch1 that contains a Survivable Branch Appliance (SBA) in Microsoft Teams.
You have a Teams Phone deployment.
A limited number of users in Branch1 report that when the internet connection to the office fails, they cannot make calls by using Teams.
You need to ensure that all the users in Branch1 can make calls in the event of an internet outage.
What should you do?

  1. Assign an SBA policy to the users in Branch1.
  2. Reregister the SBA with Azure AD.
  3. Reconfigure the PSTN trunk settings for the SBA.
  4. Assign a dial-out policy to the users in Branch1.

Answer(s): A



You are deploying Direct Routing by using a certified Session Border Controller (SBC). The FQDN of the SBC is sbc1.contoso.com. You use signaling port 5067.
You cannot place calls and receive an error message in the Microsoft Teams admin center as shown in the following exhibit.
What is a possible cause of the issue?

  1. The SIP options are disabled.
  2. The failover timer is set to 0 seconds.
  3. Licenses are not assigned to the contoso.com domain.
  4. The firewall blocks traffic on port 5067.

Answer(s): D



You have a Microsoft Teams Phone deployment.
You are deploying a new remote site.
You have a Session Border Controller (SBC) that has an E1/T1 Primary Rate Interlace (PRI) deployed to the remote site.
You plan to deploy a Survivable Branch Appliance (SBA) to ensure PSTN connectivity.
Which type of endpoints are supported by the SBA?

  1. audio conferencing in Microsoft Teams
  2. auto attendants in Microsoft Teams
  3. standard SIP devices registered to the SBC
  4. Microsoft Teams Windows desktops

Answer(s): D



Your company uses Microsoft Teams live events.
You assign the Producer role to a user named User1 for an upcoming live event.
What action can User1 perform?

  1. Invite attendees.
  2. Select a production method.
  3. Share a participant's video.
  4. Set the event group members.

Answer(s): C



Your company has offices in 10 countries. The company has a tenant dial plan configured for each country.
The company recently opened an office in a new country.
You need to create a new tenant dial plan that meets the unique dialing requirements of the new country.
What should you do?

  1. Run the Set-CsTenantDialPlan cmdlet.
  2. From the Microsoft Teams admin center, select Voice, select Dial plan, and then select Add.
  3. From the Microsoft Teams admin center, select Voice, select Voice routing policies, and then select Add.
  4. Run the New-CsOnlineVoiceRoutingPolicy cmdlet.

Answer(s): B



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