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

Teams Phone outages, misrouted calls, and unverified emergency addresses quickly become business and safety problems. This MS-721 course gives IT Directors and Team Leads a structured way to bring collaboration engineers to a consistent standard across Teams meetings, Teams Phone, PSTN connectivity, and Teams Rooms devices.

Role fit: Best for Teams administrators and collaboration engineers who already manage Teams day to day. A PowerShell overview skill brings newer admins up to speed. Assign it to the people who own voice, meeting rooms, or network readiness for real-time media.

Risk and governance: The training covers dynamic emergency calling and how to troubleshoot it, along with Intune enrollment and conditional access for Teams devices. These are the kinds of controls safety reviews and device governance discussions often depend on.

Time investment: 47 skills, about 42 hours per learner. The course moves from planning to configuration, so teams can schedule it in phases, such as meetings, then voice and Direct Routing, then devices.

Change management: Room and device recommendations are tied to user comfort with technology and real business needs, which helps your team avoid deploying features nobody uses.

Each skill ends with scenario-based and multiple-choice validation questions, giving Team Leads a practical way to check understanding before engineers apply changes in production.

IT teams use this training to keep voice, meetings, and room systems working when the business depends on them most. The scenarios come straight from day-to-day collaboration engineering work:

• Fewer outages during large meetings. Your team learns to assess bandwidth, network stability, and QoS before rollout. They also learn when an Enterprise Content Delivery Network (eCDN) prevents a company town hall with hundreds of attendees from saturating the network.
• Faster Direct Routing troubleshooting. Engineers work through real failure points: incomplete SBC certificate chains, FQDN typos, firewall rules blocking required IP ranges, and SIP OPTIONS health checks. That means fewer escalations and less time spent waiting on outside help.
• Lower emergency-calling risk. Your team learns how emergency calling fits into Teams Phone administration, then practices configuration and validation steps appropriate for MS-721 collaboration communications work.
• Room and device deployments people actually use. Team Leads learn to match Teams Rooms configurations to real user needs, so the business doesn't pay for features it won't use. Engineers also learn to apply device lock and Intune conditional access, and to troubleshoot provisioning issues without relying on guesswork.

The instructor works in both the Teams admin center and PowerShell. One example is comparing policy output before and after a change to find the exact parameter to script. This approach helps your team standardize configurations across the tenant instead of relying on manual clicks.

Knowledge

• How to choose between Teams meetings, webinars, and town halls based on attendee count and required features, and when an Enterprise Content Delivery Network (eCDN) prevents bandwidth saturation during large internal events
• The network readiness requirements for real-time Teams voice and video, including bandwidth, stability, Quality of Service (QoS), and Local Media Optimization (LMO) for keeping media traffic local
• Teams Phone architecture options, including Direct Routing requirements, PSTN gateway and SBC configuration, and the role of SIP OPTIONS messages as an SBC health check
• How dial plans, calling policies, auto attendants, call queues, and dynamic emergency calling work together to route calls correctly
• Device options for Teams Phone and Teams Rooms, including personal, common area, and conference phones, plus Intune enrollment and conditional access requirements
• Advanced meeting capabilities, including meeting templates and policies, Teams Premium features, Copilot, and virtual appointments

Ability

• Create and manage meeting, webinar, and town hall policies in the Teams admin center and PowerShell, including comparing before-and-after policy output to identify the correct parameters
• Configure Direct Routing, then validate SBC connectivity by inspecting SIP OPTIONS messages and confirming successful responses
• Build auto attendants and call queues with options such as dynamic caller ID and callback
• Configure dynamic emergency addresses, then verify them by checking the Teams client, reviewing support logs, and confirming that locations update when users move between subnets or wireless access points
• Deploy and secure Teams devices with configuration profiles and device lock, and troubleshoot remote provisioning, Bluetooth, and resource account issues
• Recommend room configurations that match business requirements and user comfort with technology