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Exam Overview
Exam Code MS-721
Exam Name Collaboration Communications Systems Engineer
Vendor Microsoft
Total Questions 243
Last Updated 26-Oct, 2026
Free MS-721 Questions Get Premium Access
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Free MS-721 Practice Questions

Explore 5 free practice questions for the Microsoft MS-721 exam and review the answers and explanations to support your preparation.

  1. Question 1

    Single answer

    You need to implement the planned changes for the lunchroom device in the Toronto office. What should you use?

    • Option A:
      hot desking
      Correct
    • Option B:
      call hold
      Correct
    • Option C:
      a calling policy 
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: A

    Explanation

    If the planned change is for a lunchroom device in the Toronto office, hot desking is the correct choice because it allows users to temporarily sign in and use a shared device in a common area or shared workspace.
    • Hot desking → Designed for shared devices used by multiple people. ✅
    • Call hold → Lets users place calls on hold; unrelated to shared device configuration. ❌
    • Calling policy → Controls calling features and permissions, not the shared-device setup. ❌
    Correct Answer: A. Hot desking.

  2. Question 2

    Single answer

    You need to validate the limited pilot based on the technical requirements. What should you use?

    • Option A:
      Microsoft 365 network connectivity test tool
      Correct
    • Option B:
      self-help diagnostics for Teams
      Correct
    • Option C:
      the test -CsTeamsShiftsConnectionValidflte cmdlet
      Correct
    • Option D:
      the Teams device usage report in the Microsoft Teams admin center
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: A

    Explanation

    To validate a limited pilot based on technical requirements, you need to verify that the network and connectivity meet the requirements for Microsoft Teams and Microsoft 365 services.
    • A. Microsoft 365 network connectivity test tool → Tests network performance, latency, routing, and connectivity to Microsoft 365 services, making it ideal for validating a pilot deployment. ✅
    • B. Self-help diagnostics for Teams → Used for troubleshooting existing Teams issues, not for pilot validation. ❌
    • C. Test-CsTeamsShiftsConnectionValidate cmdlet → Specific to Teams Shifts connectivity, not overall pilot validation. ❌
    • D. Teams device usage report → Provides usage statistics after deployment, not technical validation of requirements. ❌
    Answer: A. Microsoft 365 network connectivity test tool. ✅

  3. Question 3

    Multiple answers

    Once Direct Routing is deployed, you need to prepare the environment to support a reams SBA in the Vancouver facility. The solution must meet the technical requirements. Which three actions should you perform? Each correct answer presents part of the solution. NOTE: Each correct selection is worth one point

    • Option A:
      Register an application in Azure Active Directory (Azure AD).
      Correct
    • Option B:
      Run the New-CsTeMsSurvivablcBranchAppliancc Cmdlet.
      Correct
    • Option C:
      Enroll the SBA server in Microsoft Intune.
      Correct
    • Option D:
      Configure the S8C for media bypass.
      Correct
    • Option E:
      Configure the SBC for call forking.
      Correct
    • Option F:
      Enable ForwardPAI on the online voice gateway.
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: A, B, D

    Explanation

    To support a Teams Survivable Branch Appliance (SBA) in the Vancouver facility after deploying Direct Routing:
    • A. Register an application in Azure AD ✅
    • Required for SBA authentication and integration with Microsoft Teams services.
    • B. Run the New-CsTeamsSurvivableBranchAppliance cmdlet ✅
    • Used to create and configure the SBA object in Teams.
    • D. Configure the SBC for media bypass ✅
    • Media bypass is a requirement for SBA deployments to ensure local media flow and survivability during WAN outages.
    Why the others are incorrect:
    • C. Enroll the SBA server in Microsoft Intune ❌
    • Not required for SBA deployment.
    • E. Configure the SBC for call forking ❌
    • Call forking is unrelated to SBA functionality.
    • F. Enable ForwardPAI on the online voice gateway ❌
    • Used for caller ID scenarios, not a requirement for Teams SBA deployment.
    Correct Answers: A, B, D ✅✅✅

  4. Question 4

    Single answer

    You need to recommend a PSTN solution for the Teams Phone deployment at the retail sites. The solution must meet the technical requirements. What should you include in the recommendation?

    • Option A:
      Teams Calling Plans
      Correct
    • Option B:
      Direct Routing without media bypass
      Correct
    • Option C:
      Operator Connect
      Correct
    • Option D:
      Direct Routing with media bypass 
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: C

    Explanation

    If the requirement is to provide a PSTN solution for Teams Phone deployment at retail sites while meeting the technical requirements, Operator Connect is the best choice.
    Why C is correct
    • Operator Connect allows organizations to connect Teams Phone to the PSTN through a participating telecom operator.
    • It is simpler to deploy and manage than Direct Routing.
    • The operator manages the PSTN connectivity and infrastructure.
    • It provides a streamlined experience directly from the Teams Admin Center.
    Why the others are incorrect
    • A. Teams Calling Plans ❌
    • Microsoft provides the PSTN service directly, but this may not meet requirements that specify using a telecom operator.
    • B. Direct Routing without media bypass ❌
    • More complex to deploy and lacks the optimization provided by media bypass.
    • D. Direct Routing with media bypass ❌
    • While media bypass improves media flow, Direct Routing requires managing SBCs and is generally more complex than Operator Connect when an operator-supported solution is desired.
    ✅ Answer: C. Operator Connect.

  5. Question 5

    Single answer

    You are configuring the new call queue to replace the response group. Which setting should you disable to ensure that the agents can receive calls from the call queue? 

    • Option A:
      Music on hold
      Correct
    • Option B:
      Attendant routing
      Correct
    • Option C:
      Conference mode
      Correct
    • Option D:
      Round robin
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: C

    Explanation

    When configuring a Microsoft Teams Call Queue to replace a Response Group, you may need to disable Conference mode to ensure all agents can receive calls, particularly if some agents are using unsupported devices or configurations.
    Why C is correct
    • Conference mode uses a faster call setup method.
    • Some devices and configurations do not support Conference mode.
    • Disabling it ensures that all eligible agents can receive calls from the queue.
    Why the others are incorrect
    • A. Music on hold ❌
    • Only controls what callers hear while waiting.
    • B. Attendant routing ❌
    • A routing method for distributing calls and does not prevent agents from receiving calls.
    • D. Round robin ❌
    • Another routing method that distributes calls evenly among agents.
    ✅ Answer: C. Conference mode.