MS-721 practice test
Microsoft Collaboration Communications Systems Engineer Associate
100 practice questions, spread across the exam's topics the same way Microsoft weights them, each with a full explanation and a link to the official documentation that proves the answer. Written by a Microsoft Certified Trainer who does this work for a living.
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What is inside
Every area the exam tests
Our questions are spread the same way Microsoft weights the exam, so your practice matches the real thing.
Planning and design
20 to 25%Planning meetings, webinars and town halls and the policies behind them, PSTN audio conferencing, when Teams Premium earns its licence, the PSTN connectivity choice between Calling Plans, Operator Connect, Teams Phone Mobile and Direct Routing, Shared Calling, number inventory and porting, call flows for auto attendants and queues, dynamic emergency calling, session border controllers and survivable branch appliances, room configurations and certified devices, interoperability, and network readiness including quality of service and content delivery.
24 questionsMeetings, webinars and town halls
15 to 20%Meeting policies and settings, meeting templates and template policies, controlled-content policies, recording and transcription, virtual appointments, audio conferencing bridges and the numbers on invitations, webinar roles and scheduling access, in-organisation against public webinars, town hall settings and their advanced features, and enterprise content delivery for large audiences.
18 questionsTeams Phone
30 to 35%Dial plans and normalisation, calling, call park, caller identity, mobility, voicemail and hold policies, outbound restrictions and inbound blocking, unassigned number routing, compliance recording, auto attendants and call queues with their resource accounts and licences, queue routing methods and priorities, business hours and holidays, emergency calling locations and routing policies, assigning licences, numbers and policies including in bulk, calling features from group pickup to private lines, and Direct Routing end to end: gateways, usages, voice routes and routing policies, translation rules, media bypass and troubleshooting.
33 questionsRooms and devices
20 to 25%Device settings, updates and local network configuration, the Rooms Pro management portal, Intune requirements for Teams devices, deploying common area, user and conference phones, device tags, the SIP Gateway for existing handsets, device health monitoring and troubleshooting authentication, updates, provisioning and proximity join, Android and Windows rooms and their configuration profiles, optional features including content cameras, casting and direct guest join, and hot desking, bookable desks and bring-your-own-device spaces.
25 questionsMicrosoft last updated this exam on 29 October 2026. Our questions match that version.
How you will use it
Practise the way that suits you
- Learn as you go. Answer, read why straight away, then move on. No clock, no pressure.
- Or sit it timed. A clock, no answers until the end, and two minutes a question, so you learn to pace yourself.
- Score by topic. See which area let you down instead of one number out of a hundred.
- Go back over it. Read every question again afterwards, right and wrong, with the full explanation.
Is it for you
Who takes MS-721
Engineers who own Teams voice rather than Teams administration
A third of it is Teams Phone: routing, numbers, emergency calling and Direct Routing.
People responsible for meeting rooms and their devices
A quarter of it is rooms, panels, phones and the provisioning and monitoring behind them.
Anybody planning a move from another telephony platform
The connectivity models are compared directly rather than assumed.
Also worth doing
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