MS-700 Manage Meetings and Calling Practice Question
You are a Teams administrator for a company that uses Direct Routing with a single Session Border Controller (SBC). The SBC fails, causing all PSTN calls to fail. You need to implement a highly available and survivable solution for Direct Routing. (Choose two.)
⚠ Common exam trap
Many candidates confuse media bypass with high availability; media bypass improves media flow but does not provide redundancy if the SBC itself fails.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure multiple SBCs in the voice route and assign them to the same PSTN usage.
High availability and survivability for Direct Routing require redundant SBCs and local survivability options. Configuring multiple SBCs in a voice route ensures that if one fails, calls can route through another. Deploying Survivable Branch Appliances at branch sites provides local PSTN connectivity and call continuity if the connection to Microsoft 365 is lost. Together, these provide both redundancy and survivability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure multiple SBCs in the voice route and assign them to the same PSTN usage.
Why this is correct
Adding multiple SBCs to the same voice route provides redundancy. If one SBC fails, Teams can attempt to route the call through another SBC listed in the route. This ensures high availability for outbound and inbound calls, as the voice route will try the next SBC in the list. This is a core method for achieving Direct Routing resiliency.
- ✗
Assign a Calling Plan license to all users.
Why it's wrong here
Calling Plans are Microsoft-provided PSTN calling services, not part of Direct Routing. They do not integrate with your SBC and would not provide redundancy for your Direct Routing setup. Additionally, adding Calling Plans would not address the failure of your SBC; it would be a separate PSTN connectivity method. Thus, it does not meet the requirement.
- ✓
Configure a Survivable Branch Appliance (SBA) for each site.
Why this is correct
A Survivable Branch Appliance (SBA) provides local PSTN connectivity and call survivability if the connection to Microsoft 365 fails. In a Direct Routing scenario, an SBA can be an SBC with additional capabilities. Deploying SBAs at branch sites ensures that users can still make and receive PSTN calls even if the central SBC or the Teams service is unavailable, thus meeting the survivability requirement.
- ✗
Implement a Session Border Controller (SBC) that supports media bypass.
Why it's wrong here
Media bypass optimizes media flow by keeping it between the client and SBC, but it does not provide redundancy if the SBC fails. If the only SBC is down, media bypass does not help because there is no alternate path. Media bypass is about efficiency, not survivability. Therefore, it does not address the requirement for high availability.
- ✗
Enable cloud voicemail for all users.
Why it's wrong here
Cloud voicemail handles voicemail messages but does not provide PSTN call routing or redundancy. If the SBC fails, voicemail alone cannot route calls. While voicemail is a useful feature, it does not ensure high availability for live calls. Therefore, it does not satisfy the need for a highly available and survivable Direct Routing solution.
About these practice questions
This MS-700 question is part of Courseiva's 211-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
This MS-700 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the MS-700 exam.