Collaboration Communications Systems Engineer

Here you have the best Microsoft MS-721 practice exam questions

  • You have 283 total questions across 57 pages (5 per page)
  • These questions were last updated on February 17, 2026
  • This site is not affiliated with or endorsed by Microsoft.
Question 1 of 283
HOTSPOT -
You have a Microsoft Teams Phone deployment that contains a Session Border Controller (SBC) named SBC1.contoso.com.
Direct Routing integrates with a PBX phone system that uses only four-digit dialing and is configured to use the SBC.
Teams is configured to use dial plans that normalize any four-digit calls to E.164.
You have the following translation rule.
Exam MS-721: Question 1 - Image 1
You need to ensure that calls to the legacy PBX pass only a four-digit extension.
How should you complete the PowerShell command? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Exam MS-721: Question 1 - Image 2
Answer

Suggested Answer

Exam MS-721: Question 1 - Image 3
Question 2 of 283
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?
Answer

Suggested Answer

The suggested answer is A.

The online PSTN gateway being disabled would result in outbound PSTN calls failing while still allowing inbound PSTN calls, as the gateway needs to be operational to handle outbound call routing.

Community Votes7 votes
CMost voted
71%
ASuggested
29%
Question 3 of 283
The sales department at your company needs to route a call to multiple users and have calls route differently after business hours.
Which two features should you implement? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
Answer

Suggested Answer

The suggested answer is A, D.

To achieve the requirement of routing calls to multiple users and having calls route differently after business hours, 'call queues' and 'auto attendants' should be implemented. Call queues allow the sales department to distribute incoming calls to multiple users, ensuring that calls are handled in an orderly manner. Auto attendants can manage calls by providing automated responses and routing options based on the time of day, allowing the system to route calls differently after business hours.

Community Votes6 votes
ADSuggested
100%
Question 4 of 283
DRAG DROP -
You have a Microsoft Teams Phone deployment.
You need to create two call queues named CQ1 and CQ2. The solution must meet the following requirements:
CQ1 must balance incoming calls so that each call agent receives the same number of calls
Calls received by CQ2 must ring all call agents simultaneously
What should you configure for each requirement? To answer, drag the appropriate routing methods to the correct requirements. Each routing method may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.
Exam MS-721: Question 4 - Image 1
Answer

Suggested Answer

Exam MS-721: Question 4 - Image 2
Question 5 of 283
You have a Microsoft Teams Phone deployment.
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.
Exam MS-721: Question 5 - Image 1
What is a possible cause of the issue?
Answer

Suggested Answer

The suggested answer is D.

The issue outlined in the question is related to TLS connectivity status being inactive, which indicates a problem with the secure connection between Microsoft Teams and the certified Session Border Controller (SBC). An inactive TLS connectivity status typically points to problems with the SSL/TLS certificates used by the SBC. Specifically, the SBC might be missing required root certificates, such as Baltimore or Digicert root certificates, which are essential for establishing a trusted TLS connection. Without these root certificates, the SBC cannot properly authenticate and encrypt the signaling traffic, leading to call placement issues. Therefore, ensuring the correct root certificates are present on the SBC is crucial to resolving this problem and establishing an active TLS connection.

Community Votes4 votes
DSuggested
100%

About the Microsoft MS-721 Certification Exam

About the Exam

The Microsoft MS-721 (Collaboration Communications Systems Engineer) validates your knowledge and skills. Passing demonstrates proficiency and can boost your career prospects in the field.

How to Prepare

Work through all 283 practice questions across 57 pages. Focus on understanding the reasoning behind each answer rather than memorizing responses to be ready for any variation on the real exam.

Why Practice Exams?

Practice exams help you familiarize yourself with the question format, manage your time, and reduce anxiety on the test day. Our MS-721 questions are regularly updated to reflect the latest exam objectives.