Microsoft 365 Certified: Collaboration Communications Systems Engineer Associate (MS-721) Practice Test

This certification is designed for IT professionals who function as Collaboration Communications Systems Engineers, responsible for the end-to-end lifecycle of Microsoft Teams-based communication infrastructure. Typical job titles include Unified Communications Engineer, Teams Voice Engineer, Collaboration Engineer, and Microsoft 365 Administrator with a communications specialization. Candidates typically work in enterprise environments alongside Teams administrators, identity and access administrators, Microsoft 365 administrators, and stakeholders such as facilities managers, network engineers, security engineers, device manufacturers, and telephony providers.

The ideal candidate has hands-on experience configuring Teams Phone systems, managing meeting policies, deploying and maintaining physical room devices, and working with PSTN connectivity. A background in networking, telecommunications, audio/visual technology, and identity and access management is strongly recommended. This certification suits professionals seeking to formalize their expertise in the Microsoft communications stack and advance toward the Microsoft 365 Certified: Teams Voice Engineer Expert credential.

Microsoft does not enforce formal prerequisites for the MS-721 exam, but candidates are expected to have substantial hands-on experience with Microsoft Teams administration before attempting it. Recommended foundational knowledge includes a solid understanding of Microsoft 365 services, Azure Active Directory (Entra ID) identity and access management, and general networking concepts such as DNS, firewalls, QoS, and SIP/PSTN telephony. Familiarity with the Microsoft Teams admin center and PowerShell scripting for Teams management is essential.

Microsoft recommends candidates complete the official instructor-led course MS-721T00: Plan, Configure, and Manage Collaboration Communications Systems with Microsoft Teams, available through Microsoft Learning Partners. Prior experience in a Unified Communications or telephony role is highly beneficial, particularly for the Direct Routing and Teams Phone domains, which represent 30–35% of the exam. Candidates without this background should budget additional time to study SBC configuration, PSTN gateway setup, voice routing policies, and emergency calling architecture.

Exam MS-721 is a 100-minute proctored assessment delivered through Pearson VUE, available for online proctoring or at authorized test centers. The exam typically contains approximately 40–60 scored questions, which may include multiple-choice, multiple-select, drag-and-drop, case studies, and interactive lab-based components. Interactive components (if present) require candidates to perform tasks in a simulated Microsoft Teams admin environment. A score of 700 out of 1000 is required to pass.

The exam is available in English, Chinese (Simplified), French, German, Japanese, Portuguese (Brazil), and Spanish. Non-English speakers may request an additional 30 minutes if taking the exam in a language other than their native tongue. Microsoft strongly recommends registering with a personal Microsoft account (MSA) rather than an organizational AAD account to ensure exam records are retained if you leave your organization. The certification is valid for 12 months and can be renewed at no cost by passing a free online renewal assessment on Microsoft Learn.

• 1.Plan and Design Collaboration Communications Systems (20–25%): Covers planning Teams meetings, webinars, and town halls; designing meeting and policy packages; evaluating Teams Premium and Microsoft 365 Copilot; planning PSTN connectivity options including Calling Plans, Operator Connect, Teams Phone Mobile, Direct Routing, and Shared Calling; designing auto attendant and call queue flows; planning emergency calling architecture; evaluating SBC solutions; recommending certified devices and Teams Rooms configurations; and preparing the network using QoS, the Network Planner, and the Teams Network Assessment Tool.
• 2.Configure and Manage Teams Meetings, Webinars, and Town halls (15–20%): Covers creating and managing meeting policies, settings, templates, and template policies; configuring Teams Premium meeting features including breakout rooms, polls, Q&A, and avatars; configuring Cloud Video Interop; setting up meeting recording and transcription with Copilot support; managing audio conferencing bridge numbers and toll-free conferencing; configuring webinar roles, attendee interaction, and advanced webinar policies; and setting up Town Hall features including eCDN for large-scale broadcasts and integration with Viva Engage and Microsoft Stream.
• 3.Implement and Configure Teams Phone (30–35%): The highest-weighted domain, covering creation and configuration of dial plans, calling policies, call park, caller ID, voicemail, compliance recording, and Shared Calling policies; configuring resource accounts, auto attendants, and call queues including routing methods, Music on Hold, callback, and the Queues App; configuring emergency calling locations, Location Information Service (LIS), and dynamic emergency address; assigning licenses and phone numbers via admin center and PowerShell; configuring call forwarding, delegation, group call pickup, and private lines; and full Direct Routing configuration including SBC connectivity, PSTN usage records, voice routes, LBR, Local Media Optimization, trunk translation, and troubleshooting.
• 4.Configure and Manage Teams Rooms and Devices (20–25%): Covers managing Teams Rooms from the Teams Rooms Pro Management portal and Microsoft Intune; deploying and configuring common area phones, conference phones, and SIP devices via SIP Gateway; managing Android devices with AOSP and MDEP enrollment; customizing Teams Rooms on Windows via XML configuration files and Group Policy exclusions; configuring optional room features such as content cameras, HDMI ingest, proximity join, Direct Guest Join, Teams casting, and AI-enabled voice/video; setting up bookable desks and BYOD spaces; and troubleshooting authentication, update, provisioning, and proximity join issues.

• Start with the official MS-721 Study Guide on Microsoft Learn (aka.ms/MS721-StudyGuide), which maps all exam objectives by domain with percentage weights. Use it as your master checklist to identify gaps before your exam date.
• Take the free official Practice Assessment on Microsoft Learn (linked directly from the MS-721 certification page) to get familiar with question style and difficulty. Review every incorrect answer using the provided explanations before attempting again.
• Focus the most preparation time on the 'Implement and Configure Teams Phone' domain (30–35%), especially Direct Routing. Build hands-on experience configuring SBC connectivity, PSTN gateways, voice routes, and troubleshooting via the Teams admin center using a Microsoft 365 developer tenant.
• Complete the instructor-led course MS-721T00 (available via Microsoft Learning Partners or self-paced on Microsoft Learn) to gain structured coverage of all four domains. The course includes labs that mirror real-world scenarios tested on the exam.
• Use the Exam Sandbox at aka.ms/examdemo to experience the actual exam interface before test day, particularly to practice navigating interactive lab components if they appear in your exam version.
• Study the Microsoft Teams admin documentation at learn.microsoft.com/en-us/MicrosoftTeams, especially the articles on Direct Routing, emergency calling (E911), Location Information Service, auto attendants, and call queues — these are heavily represented in the highest-weighted domain.
• Join the Microsoft Teams Tech Community (techcommunity.microsoft.com) to follow real-world deployment discussions and ask questions in the Microsoft Q&A forum. Exposure to edge cases and troubleshooting scenarios discussed there directly reinforces exam readiness.

Professionals who hold the MS-721 certification are positioned for roles such as Unified Communications Engineer, Collaboration Engineer, Teams Voice Engineer, and Microsoft 365 Communications Architect. Certified individuals typically command salaries in the range of $85,000–$110,000+ per year, with variation based on geography, experience level, and employer. The certification is a direct prerequisite pathway toward the Microsoft 365 Certified: Teams Voice Engineer Expert credential, which targets senior engineers responsible for complex enterprise telephony architectures.

Demand for certified Teams communications engineers is driven by the widespread adoption of Microsoft Teams across enterprise organizations — Microsoft Teams is used by an estimated four out of five Fortune 500 companies. As organizations invest in Teams Phone to replace legacy PBX infrastructure, Teams Premium for AI-enhanced meeting experiences, and Teams Rooms for hybrid workplace strategies, the need for specialists who can deploy and manage these systems is substantial. Compared to more general Microsoft 365 certifications, the MS-721's focus on telephony, devices, and advanced meeting infrastructure gives it a distinct specialization value in the job market.