MS-700 Manage Meetings and Calling Practice Question
You are the Teams administrator for a company that uses Microsoft Teams Phone with Calling Plans. The service desk reports that when a user dials a 10-digit US number, the call fails with a 'number not in service' recording, but dialing the same number with a leading +1 succeeds. You must fix this for all affected users with the least administrative effort. What should you do?
⚠ Common exam trap
The trap here is assuming a failed outbound call means the user's phone number or voice routing policy is misconfigured, when the real issue is missing dial-string normalization.
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
✓
Create a new dial plan with an appropriate normalization rule and assign it to the affected users.
The failure is limited to how a dialed national number is translated, not to the user's assigned number or routing rights. A dial plan with normalization rules converts dialed digits into E.164 so Teams Phone can match a route, and it applies tenant-wide or per user. Because the +1 form already works, the fix is normalization rather than number reassignment or route policy changes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Assign a new calling policy that enables the 'Prevent toll bypass' setting to the affected users.
Why it's wrong here
Prevent toll bypass is a voice-routing setting that restricts which routes and PSTN usages a user may consume; it does not perform number normalization. Enabling it would not convert a ten-digit national number into E.164 and could even block legitimate routes. The symptom points to number translation, not to route authorization.
- ✓
Create a new dial plan with an appropriate normalization rule and assign it to the affected users.
Why this is correct
Dial plans translate the number a user dials into E.164 format before routing. If a 10-digit national number is not normalized to +1XXXXXXXXXX, Teams Phone sends an unroutable string and the call fails, while a manually entered +1 number already matches E.164. A tenant or user dial plan with a normalization rule fixes this consistently for every affected user.
- ✗
Reassign the affected users' phone numbers from the Microsoft Teams admin center so that the numbers are re-provisioned.
Why it's wrong here
Reassigning or re-provisioning a user's phone number changes the inbound DID mapping but leaves outbound dial-string normalization untouched. The number is already valid because the +1 form connects successfully, so reprovisioning the DID does not address the failure and would cause unnecessary service disruption for users who can already place calls correctly.
- ✗
Modify each affected user's LineUri attribute to include the ten-digit national format as a secondary number.
Why it's wrong here
LineUri defines the single telephone number assigned to a user for inbound PSTN routing, not the dialing patterns used for outbound calls. Adding a national-format value does not change how Teams normalizes a number the user types, so outbound calls would still fail. This attribute is not used to create outbound dialing translations.
About these practice questions
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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.