Microsoft · MS-721 · Associate

Collaboration Communications Systems Engineer (MS-721) — Practice Questions and Mock Exam

Name: Pass-IT
Author: Pass-IT

Prepare for MS-721 with original practice questions and clear answer explanations. Ask Alex, your AI tutor, when you need more detail, use your results to identify topics to review, and practice your pacing with timed mock exams.

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50Mock exam questions

100minTime limit

700/ 1000Passing score

Checked against Microsoft · August 2026 · Current exam version

Overview

About the exam

The MS-721 certification validates skills in planning, designing, configuring, and managing Microsoft Teams voice, video, meetings, and certified devices. It covers Teams Phone System deployment, SBC and direct routing configuration, PSTN connectivity, emergency calling, compliance recording, Teams Rooms setup, and collaboration device management across enterprise environments.

This certification is designed for collaboration communications systems engineers who specialize in Microsoft Teams telephony and meeting room solutions. Candidates should have experience with telecommunications, networking, and Microsoft Teams voice architecture, along with proficiency in configuring SBCs, call routing, and Teams certified devices.

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Try five MS-721 questions

Try five practice questions from the app’s current Collaboration Communications Systems Engineer question bank, with answers and explanations.

Plan and design collaboration communications systems1 / 5

Fabrikam wants to eliminate USB dongles from its headset fleet because users frequently lose them and many laptops have too few USB ports. The fleet is split roughly evenly between Windows 11 laptops and macOS laptops. You must recommend a headset standard that is Certified for Microsoft Teams and preserves the Teams button and call-control experience. What should you recommend?

AlexFull explanation from Alex

Recommending Teams-certified devices requires reading the scope of a certification designation, not just its name. Certification designations carry platform boundaries and known caveats: Microsoft also notes that native Bluetooth performance depends on the host PC's Bluetooth radio, so a subset of users in high-density radio environments may still need the USB dongle. Device standards should be written per platform and per environment.

Sourcelearn.microsoft.com

Implement and configure Teams Phone2 / 5

A Teams Phone user needs to enable call delegation. Where is this feature controlled at the admin level?

AlexFull explanation from Alex

Per Microsoft docs, calling policies control call delegation. The 'Delegation for inbound and outbound calls' toggle in calling policies (Voice > Calling policies) determines whether users can configure delegates. Dial plans handle number normalization, not feature access. Voicemail policies govern voicemail settings like transcription and greeting. Voice routing policies contain PSTN usage records for Direct Routing call routing. Only calling policies manage the delegation feature toggle.

Sourcelearn.microsoft.com

Configure and manage Teams Rooms and devices4 / 5

A Teams phone with a Microsoft Teams Shared Devices license is mounted next to a warehouse loading dock. When the handset is lifted, it must automatically dial the site security desk. Where do you turn on this hotline (PLAR) behavior for the device in the Microsoft Teams admin center?

AlexFull explanation from Alex

Shared space Teams phones are managed with device configuration profiles rather than per-user policies. The profile carries the device-level calling behavior, such as the Advanced calling home screen experience and the hotline (PLAR) experience. The same hotline can also be configured locally on the device under Settings > Device settings > Admin only > Calling > Hotline, where you enter the contact or phone number to autodial and the display name shown on the home screen.

Sourcelearn.microsoft.com

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Question pool

396 practice questions

The Pass-IT question pool gives you material to practice for MS-721. A Pass-IT mock exam uses 50 questions and a 100-minute time limit; these are practice settings.

Pool details: MS-721

Exam details checked against MicrosoftAugust 28, 2026

date of the last check against the official Microsoft source

Passing score700 / 1,000

as published by Microsoft

Objectives in the guide192 objectives listed in the official guide

across 4 domains in the official exam guide

Pool size396 questions

= The pool size is equivalent to 7 sets of 50 questions; this does not mean that each mock exam uses a separate set.

Blueprint domains4 domains in the exam blueprint

Plan and design collaboration communications systems 84 · Configure and manage Teams meetings, webinars, and town halls 69 · Implement and configure Teams Phone 134 · Configure and manage Teams Rooms and devices 109

Recorded as checked against sources396 of 396

questions recorded as having their answer, options, and explanation checked against official Microsoft documentation

How questions are made →

Exam domains

What's on the exam

Implementing and configuring Teams Phone carries the most weight at 30–35%, the exam's telephony core — call routing, auto-attendants, queues, number assignment, and emergency calling. Planning and designing collaboration systems and configuring Teams Rooms and devices tie at 20–25% each, while meetings, webinars, and town-hall configuration sits lightest at 15–20%.

The weighting reflects the role: this is a voice and telephony specialization inside Teams administration, not a generalist meetings exam. Candidates who come from general Teams admin experience but haven't configured SBCs, direct routing, or dynamic emergency calling face the largest single domain underprepared, since Teams Phone alone approaches a third of the exam.

Exam blueprint: MS-721

Plan and design collaboration communications systems20–25%

Plan Teams gatherings - regular meetings, webinars, town halls - alongside PSTN calling and Direct Routing, choose which certified devices and room configurations fit a space, and prepare the underlying network with QoS and bandwidth planning so all of it actually performs.

≈ 13 h

Configure and manage Teams meetings, webinars, and town halls15–20%

Configure and manage Teams meeting policies, features, and templates, set up Audio Conferencing bridges and numbers, and configure Teams webinars and town halls including roles, policies, and attendee experience.

≈ 9 h

Implement and configure Teams Phone30–35%

Build out Teams Phone policies plus the auto-attendant and call-queue setups that route incoming calls, send emergency calls to the right location, assign phone numbers and licenses to the people who need them, configure everyday calling features like forwarding and voicemail, and connect an on-premises SBC through Direct Routing.

≈ 17 h

Configure and manage Teams Rooms and devices20–25%

Keep Teams Rooms hardware healthy day to day - device and network settings, update cadence, health monitoring - across both Android and Windows platforms, and layer on extras like content cameras, proximity join, plus BYOD-ready spaces and desk-booking setups.

≈ 13 h

Format

Exam format and question types

The exam draws 40–60 questions from a mix of multiple-choice, multiple-select, drag-and-drop, and hot-area formats inside a 100-minute window. Questions run technically deep — SBC and trunk configuration, call-routing policy decisions, PSTN connectivity options, and Teams Rooms deployment scenarios rather than surface-level settings. Expect network-planning and QoS details to matter as much as the Teams admin center configuration itself.

Question types: MS-721

Multiple Choice42%

Select the single answer that best meets the question’s requirements.

Drag & Drop16%

Move items into the slots, groups, or sequence specified by the task.

Ordering11%

Arrange the steps in the sequence needed to complete the process.

Multiple Response11%

Select multiple answers. Follow the question’s instructions on how many to choose.

Dropdown11%

Choose options from dropdown menus to complete a statement or configuration.

True / False9%

Decide whether a statement is true or false, paying attention to its conditions and wording.

See Microsoft for official question-format information. The shares shown describe the Pass-IT practice pool; they do not establish the proportions on the official exam.

Planning

Preparing for MS-721

The exam runs through Pearson VUE, either online with a remote proctor or at an authorized testing center, and is offered in English, German, French, Spanish, Portuguese, Japanese, and Chinese. Certification holds for one year, and Microsoft opens a free renewal assessment on Learn starting six months before it expires.

Preparation and logistics: MS-721

Preparation

Illustrative study time30–75 h

illustrative planning range: 30 h with relevant experience to 75 h when starting out; your needs may fall outside this range

LevelAssociate

Taking and maintaining the certification

DeliveryPearson VUE online proctored or at authorized testing centers worldwide

Retake policy24-hour wait after the first attempt, 14 days between subsequent attempts, maximum 5 attempts per exam within a 12-month period

Certification validity1 year

Free renewal assessment on Microsoft Learn, available starting 6 months before expiration. Must be completed before the certification expires.

Official guideView on provider site

Study notes

Common pitfalls

Topics to review: MS-721

01Direct Routing
Not understanding Session Border Controller (SBC) configuration, trunk setup, and the voice-routing policy layer that Direct Routing calls depend on.
02PSTN Options
Confusing Microsoft Calling Plans, Operator Connect, and Direct Routing options and their respective requirements.
03Emergency Calling
Struggling with dynamic emergency calling configuration, network topology, and emergency address assignment policies.
04Teams Rooms
Overlooking Microsoft Teams Rooms deployment planning, account configuration, and device management via Teams admin center.
05Call Quality
Not knowing how to analyze and troubleshoot call quality using network planning tools and Quality of Service (QoS) configurations.

Practice with questions and explanations in Pass-IT →

Questions

Frequently asked questions

How long is the Collaboration Communications Systems Engineer exam?

The MS-721 exam has 50 questions and a 100-minute time limit.

What is the passing score for Collaboration Communications Systems Engineer?

The passing score for the MS-721 exam is 700 / 1000.

Which pitfalls should I review when preparing for Collaboration Communications Systems Engineer?

Topics to review include Direct Routing, PSTN Options, Emergency Calling, Teams Rooms, Call Quality. Work through examples to check that you understand the distinctions and can explain your answer.

How is MS-721 weighted?

Implementing and configuring Teams Phone is the largest area at 33%, with planning and designing collaboration communications systems and managing Teams Rooms and devices at 25% each. Meetings, webinars and town halls take 17%. Two thirds of the exam is voice and hardware, which is what separates it from MS-700.

MS-700 or MS-721 — which Teams exam?

MS-700 is the Teams administrator exam, weighted 42% towards configuring the tenant environment. MS-721 is the communications engineer exam, weighted a third towards Teams Phone and another quarter towards rooms and devices. If you provision users and policies, MS-700 fits; if you deploy handsets, dial plans and meeting rooms, MS-721 does.

What do you need before MS-721?

No certification is required. The catalog budget is around 50 hours, and the exam assumes telephony concepts such as dial plans and routing rather than teaching them. Coming from a pure Microsoft 365 background, that voice material is usually the longest part of the preparation.

How soon can you retake MS-721?

After 24 hours for a second attempt, then 14 days between any further ones. Five attempts on the same exam are allowed within a 12-month period.

One certification, 12 months

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