Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
A company with 100 users has Microsoft 365 Business Basic licenses. They want to add Phone System and Audio Conferencing for all users to enable PSTN calling and dial-in capabilities. They wish to minimize additional costs. What is the most cost-effective licensing approach?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Upgrade all users to Microsoft 365 E3 and add Phone System and Audio Conferencing.
This is significantly more expensive because it requires upgrading the entire plan to E3 (which includes many unnecessary features) plus the telephony add-ons.
B
Best answer
Add the Microsoft 365 Business Voice add-on for each user.
Business Voice is a cost-effective bundle that provides Phone System, Audio Conferencing, and a calling plan for Business Basic users. It is the recommended way to add these capabilities to Business plans.
C
Distractor review
Purchase Phone System and Audio Conferencing as standalone add-ons separately.
Purchasing these as separate standalone add-ons would likely cost more per user than the bundled Business Voice add-on, which is priced to be the most economical option.
D
Distractor review
Add the Microsoft Teams Phone Standard add-on.
Teams Phone Standard is the newer name for the Phone System add-on, but it does not include Audio Conferencing. You would still need to add Audio Conferencing separately, making it more expensive than the Business Voice bundle.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Related practice questions
Related MS-900 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
During requirements gathering, an IT manager says the organization must let users provision resources from a portal without provider interaction. Cloud concept or benefit best matches this requirement?
Question 2
A compliance-aware administrator is selecting the right Microsoft 365 capability to use Microsoft 365 and another public cloud provider for different workloads. Cloud concept or benefit best matches this requirement?
Question 3
While preparing a Microsoft 365 adoption plan, a consultant is asked to manage leads, opportunities, customer accounts, and sales processes. Microsoft 365 app or service is the best fit?
Question 4
A project manager needs to create a detailed project schedule with a Gantt chart view, task dependencies, critical path analysis, and milestones. The schedule must be shared with team members who can update their tasks, and the manager wants to track progress against a baseline. Which Microsoft 365 app is specifically designed for this type of project management?
Question 5
A project manager wants to schedule a meeting with team members to discuss project progress. They need to find a time that works for everyone based on their calendars. Which Microsoft 365 app should they use?
Question 6
A project manager wants to create a visual dashboard that tracks project tasks, deadlines, and progress. The dashboard should pull data from a Microsoft List and update in real time. Which Microsoft 365 app is best suited for building this interactive dashboard?
FAQ
Questions learners often ask
What does this MS-900 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Add the Microsoft 365 Business Voice add-on for each user. — Microsoft 365 Business Voice is a bundle add-on for Business Basic (and other Business plans) that includes Phone System, Audio Conferencing, and a domestic calling plan. It is designed to provide all the necessary telephony features for small and medium businesses at a lower overall cost than purchasing Phone System and Audio Conferencing as separate standalone add-ons or upgrading to a higher plan like E3.
What should I do if I get this MS-900 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
Discussion
Loading comments…
Sign in to join the discussion.