PL-900 Practice Question: Demonstrate the capabilities of Microsoft Copilot Studio
A company's copilot in Microsoft Copilot Studio answers HR questions from a SharePoint knowledge source. Users report that answers are sometimes wrong or outdated even though the SharePoint pages were recently edited. The copilot uses generative answers. What should you do first to improve answer accuracy?
⚠ Common exam trap
The trap here is jumping to prompt or topic changes when the symptom of wrong answers after recent edits points to the knowledge index not being refreshed.
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
✓
Verify that the SharePoint knowledge source is configured with the correct site and that content has been reindexed or refreshed.
Stale or incorrect generative answers often trace to the knowledge source not reflecting recent changes. Confirming the correct SharePoint site is connected and refreshing or reindexing the content is the appropriate first step. Switching to authored topics, changing authentication, or adding trigger phrases does not address outdated knowledge retrieval.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Change the copilot's authentication setting to require sign-in for all users.
Why it's wrong here
Authentication affects who can access the copilot and what content they are permitted to see, but it does not by itself fix stale or wrong answers from a SharePoint source. If the index is outdated, requiring sign-in will not refresh it. This change does not target the retrieval accuracy problem described.
- ✗
Switch the copilot to use only authored topics for all HR questions.
Why it's wrong here
Replacing generative answers with authored topics would require manually building every HR question and answer, which is a large effort and not the first step for a suspected indexing issue. The symptom points to stale or incorrect knowledge retrieval, so reauthoring all content does not address the root cause efficiently.
- ✗
Increase the number of trigger phrases on each HR topic.
Why it's wrong here
Trigger phrases influence how authored topics are matched, but the copilot is using generative answers from SharePoint. Adding trigger phrases does not update the knowledge index or correct wrong content retrieval. This option misdiagnoses the issue as topic routing rather than knowledge freshness.
- ✓
Verify that the SharePoint knowledge source is configured with the correct site and that content has been reindexed or refreshed.
Why this is correct
When answers are wrong or stale despite page edits, the first check is whether the correct site is connected and whether the knowledge index reflects the latest content. Reindexing or refreshing the knowledge source ensures the copilot retrieves current pages, addressing the most likely cause before changing prompts or channels.
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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
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