MS-700 Manage Meetings and Calling Practice Question
You are a Teams administrator for a company that uses Microsoft Teams Phone with Direct Routing. A user reports that they can make outbound calls to external numbers, but inbound calls from the PSTN fail to reach them. You have verified that the SBC is online and the voice routing policy is correctly configured. What is the most likely cause?
⚠ Common exam trap
The trap here is assuming that inbound call failures are due to user-level settings, when they are typically caused by SBC or routing misconfigurations.
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
✓
The SBC is not configured to send inbound calls to the correct SIP domain or the user's phone number is not properly mapped.
Inbound call failures in Direct Routing often stem from SBC configuration issues, such as incorrect SIP domain or number mapping. The SBC must be configured to route inbound calls to Microsoft's SIP proxy using the correct domain, and the called number must match the user's assigned phone number. Outbound calls working indicates that the user's Enterprise Voice and dial plan are fine. Therefore, the most likely cause is an SBC or number mapping problem.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The user's calling policy does not allow inbound calls.
Why it's wrong here
Calling policies in Teams do not have a setting to block inbound calls. They control features like call forwarding, voicemail, and simultaneous ring. Inbound call routing is determined by the SBC and the voice routing policy, not the calling policy. Therefore, this is not the cause.
- ✗
The user is not enabled for Enterprise Voice.
Why it's wrong here
If the user were not enabled for Enterprise Voice, they would not be able to make outbound calls either. Since outbound calls work, Enterprise Voice is enabled. Inbound call failures are more likely due to SBC or number mapping issues.
- ✓
The SBC is not configured to send inbound calls to the correct SIP domain or the user's phone number is not properly mapped.
Why this is correct
For inbound calls to reach a user, the SBC must route the call to Microsoft's SIP proxy with the correct SIP domain, and the called number must be associated with the user's Teams Phone number. If the SBC is not configured to send calls to the correct domain or the number mapping is incorrect, inbound calls will fail. This is a common misconfiguration in Direct Routing.
- ✗
The user does not have a dial plan assigned.
Why it's wrong here
A dial plan is used for outbound call normalization. Since the user can make outbound calls successfully, the dial plan is likely working. Inbound calls do not rely on the user's dial plan; they are routed based on the SBC and voice routing configuration. Thus, a missing dial plan would not cause inbound call failures.
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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.