PL-900 Practice Question: Demonstrate the capabilities of Microsoft Copilot Studio
A facilities team built a copilot in Microsoft Copilot Studio that answers questions about building access policies. The knowledge is stored in a public Microsoft SharePoint site. Users report the copilot returns generic answers instead of citing the policy documents. The maker confirmed the SharePoint URL is added as a knowledge source. What should the maker verify first?
⚠ Common exam trap
The trap here is assuming a configured URL is automatically an active knowledge source, when the source must also be enabled and successfully indexed.
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
✓
That the SharePoint site is published and the copilot's knowledge source is enabled and indexed.
When a copilot returns generic answers despite a configured SharePoint knowledge source, the most likely cause is that the source is disabled or has not finished indexing. Generative answers require an enabled, indexed source to retrieve and cite content. Confirming enablement and index status is the correct first diagnostic action before altering channels, themes, or authentication.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
That the copilot's authentication mode is set to no authentication.
Why it's wrong here
Authentication mode governs how users sign in to the copilot for personalized or restricted content. A public SharePoint site does not require user authentication for retrieval. Switching authentication would not resolve generic answers and could introduce sign-in friction. The relevant setting is the knowledge source's enabled and indexed state, not the copilot's auth mode.
- ✗
That the copilot is published to the correct Microsoft Teams channel.
Why it's wrong here
Channel publication affects where users reach the copilot, not whether it can retrieve knowledge. If users are already chatting with it, the channel is working. The reported symptom is generic answers, which points to knowledge retrieval rather than channel configuration. Checking Teams publishing would not fix missing citations from SharePoint content.
- ✓
That the SharePoint site is published and the copilot's knowledge source is enabled and indexed.
Why this is correct
Generative answers rely on enabled, successfully indexed knowledge sources. If the SharePoint source is disabled or indexing failed, the copilot falls back to generic model responses. Verifying that the source is enabled and indexed directly addresses the symptom of generic answers despite a configured URL. This is the first diagnostic step before changing topics or authentication settings.
- ✗
That the SharePoint site uses a custom theme with the correct branding.
Why it's wrong here
Theming changes the visual appearance of a SharePoint site and has no effect on whether Copilot Studio can index its content. A custom theme does not block or enable knowledge retrieval. Focusing on branding would misdiagnose the issue, because generic answers stem from knowledge source indexing or enablement, not site styling.
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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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