Exam Code: MS-721
Exam Questions: 616
Collaboration Communications Systems Engineer
Updated: 25 Nov, 2025
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Question 1

You have a Microsoft Teams Phone deployment.
You have Teams devices located in meeting rooms and public areas.
You need to turn on Device lock for the devices.
What should you configure?

Options :
Answer: D

Question 2

Which audio device does Teams Phone support for hands-free calling? 

Options :
Answer: A

Question 3

You have a Microsoft Teams Phone deployment.

You are deploying Direct Routing.

All users have a SIP URI in the format of [email protected]. The Session Border Controller (SBC) is named sbc.voice.contoso.com.

When troubleshooting errors on the SBC, you receive the warning shown in the following exhibit.

What is a possible cause of the issue?

Options :
Answer: D

Question 4

What is the default ringtone on Teams Phone? 

Options :
Answer: A

Question 5


You have a Microsoft Teams Phone deployment. The 613 7010 5XXX phone number range is allocated to the Session Border Controller (SBC). A user named User1 is configured as shown in the following exhibit. User1 reports that when an external caller attempts to call the phone number of User1, the external caller receives an error message. User1 can make outbound calls, but no caller ID appears. Which two commands should you run to resolve the issues? Each correct answer presents part of the solution.

NOTE: Each correct selection is worth one point. 

Options :
Answer: C,D

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