Microsoft MS-721 Exam Dumps

Get All Collaboration Communications Systems Engineer Exam Questions with Validated Answers

MS-721 Pack
Vendor: Microsoft
Exam Code: MS-721
Exam Name: Collaboration Communications Systems Engineer
Exam Questions: 274
Last Updated: August 23, 2026
Related Certifications: Microsoft 365, Teams Voice Engineer Expert
Exam Tags: Modern work certifications Professional Microsoft 365 AdministratorSystems engineers
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Free Microsoft MS-721 Exam Actual Questions

Question No. 1

You have a Teams Phone deployment that uses Direct Routing on a single Session Border Controller (SBC).

Users report that outbound PSTN calls are failing, but inbound PSTN calls are successful.

When you review the SBC logs, you discover that Microsoft is responding to SIP option requests, but is NOT sending SIP option requests.

What is the cause of the issue?

Show Answer Hide Answer
Correct Answer: A

Issues that affect outbound direct routing calls

You might experience various issues when you use Direct Routing to make outbound calls from a Microsoft Teams client to a Session Border Controller (SBC). These issues include the following:

An incorrect caller ID is displayed to the call recipient.

A connection to the SBC is not established.

Some users in a tenant are unable to make calls.

No users in a tenant are able to make calls.

No users are able to make calls

If none of the users are able to make calls, the calls are probably not reaching the SBC. Check for one of the following causes.

Cause 1

Teams has a disabled gateway.

Resolution 1

Use the Microsoft Teams admin center to make sure that the gateway that's used by Teams is available and enabled.


https://learn.microsoft.com/en-us/microsoftteams/troubleshoot/phone-system/direct-routing/issues-with-outbound-calls

Question No. 2

Your company has a Microsoft Teams Phor>e deployment.

The company has a direct inward dial (DID) phone number range of +14035554300 to +14035554329.

Phone numbers +14035554310 to +14035554325 are assigned to Teams users, auto attendants, and call queues.

You need to ensure that when an unassigned number is dialed, the caller is forwarded to a call queue named Reception.

Which three actions should you perform? Each correct answer presents a part of the solution.

NOTE: Each correct selection is worth one point.

Show Answer Hide Answer
Correct Answer: C, E, F

Question No. 3

Your company has a main office in Dallas.

The company has a Microsoft Teams Phone deployment.

Currently, the default audio conferencing bridge is set to a phone number that has a Miami area code.

In the Microsoft Teams admin center, you get a number in the Dallas area code.

You need to assign the new Dallas number as the default audio conferencing bridge.

What should you configure in the Microsoft Teams admin center?

Show Answer Hide Answer
Correct Answer: A

https://docs.microsoft.com/en-us/microsoftteams/change-the-phone-numbers-on-your-audio-conferencing-bridge

Question No. 4

Your company has a Microsoft 365 E5 subscription that uses Microsoft Teams.

The company has a department named HR.

You need to ensure that when a user in the HR department creates a highly confidential meeting, a watermark is applied to the recording.

Which two actions should you perform? Each correct answer presents part of the solution.

NOTE: Each correct selection is worth one point.

Show Answer Hide Answer
Correct Answer: A, B

Watermark requires a Teams Premium license and it is enabled in a Meeting Policy: https://learn.microsoft.com/en-US/microsoftteams/settings-policies-reference?WT.mc_id=TeamsAdminCenterCSH#watermark


Question No. 5

Your company uses Microsoft Teams live events for online employee training sessions.

During the last live event, there were 100 attendees in a remote office. The attendees reported connectivity issues.

You discover that the internet connection at the remote office was saturated.

You need to minimize the impact of live events on the internet links of the remote office.

What should you do?

Show Answer Hide Answer
Correct Answer: D

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