300 practice questions for Collaboration Communications Systems Engineer (MS-721), with full explanations.
Every question comes with the correct answer, the reasoning behind it, and a short note on why each wrong option is wrong. Work through it once with the answers, then again with the questions-only copy under exam conditions.
- 300 questions mapped to the MS-721 exam objectives
- Answers and explanations for every question, including the wrong options
- A questions-only PDF for timed practice runs
- Instant delivery by email the moment you check out
- Free monthly updates for as long as the exam is live
- Pass or your money back
An MS-721 attempt costs US$165 in the US. This pack is US$39, paid once.
Try 10 questions free before you buy.
Last updated September 2026 · 300 questions
What makes the MS-721 hard
MS-721 is the deep-voice sibling of MS-700: where the Teams admin exam touches telephony, this one lives in it, and telephony is where generalist M365 admins run out of road.
The bank is dominated by voice engineering decisions: Direct Routing SBC configuration and certificate requirements, Calling Plans versus Operator Connect trade-offs, dial plans and normalisation rules, emergency calling with dynamic locations, and auto attendant and call queue design. Then the rooms layer: Teams Rooms deployment, device management, and the meeting-quality troubleshooting workflow through CQD.
Teams Phone alone is 30 to 35% of the exam, the single heaviest domain, with planning and design another 20 to 25%. It is a smaller candidate pool than MS-700, but a far more specialised one, with prep material to match.
About the exam
MS-721 certifies planning and managing Teams collaboration communications: Teams Phone with Direct Routing, Operator Connect and Calling Plans, meeting rooms and devices, and voice troubleshooting. Skills measured as of 28 April 2026. Renews annually via a free online assessment.
Exam domains
- Plan and design collaboration communications systems: 20 to 25%
- Configure and manage Teams meetings, webinars, and town halls: 15 to 20%
- Configure and manage Teams Phone: 30 to 35%
- Configure and manage Teams Rooms and devices: 20 to 25%
Around 40 to 60 questions, 100 minutes, passing score 700 out of 1000, US$165 in the US, priced by local currency elsewhere, online proctored or test centre, renews annually for free.
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