PL-900 Practice Question: Demonstrate the capabilities of Microsoft Copilot Studio
A company wants to create a custom copilot that answers employee questions about IT policies. The copilot must use existing SharePoint documents as a knowledge source. Which feature of Microsoft Copilot Studio should the company use?
⚠ Common exam trap
It's easy for candidates to confuse the 'Generative AI feature' (which enables AI responses) with the specific mechanism to provide source data, or they mistakenly think Copilot for Microsoft 365 is a feature within Copilot Studio for adding knowledge sources, when it is a separate product.
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
✓
Add a knowledge source
The 'Add a knowledge source' feature in Microsoft Copilot Studio allows you to connect a copilot to existing SharePoint document libraries, enabling it to retrieve and answer questions based on the content of those documents. This is the direct mechanism for grounding a custom copilot with enterprise content without requiring additional development.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Generative AI feature
Why it's wrong here
Generative AI is a capability within Microsoft Copilot Studio, not the feature that connects a knowledge source. It generates responses from whatever grounding is configured, but does not itself ingest SharePoint documents. The correct feature is the knowledge source configuration that points the copilot at SharePoint content.
- ✗
Power Automate cloud flow
Why it's wrong here
Power Automate cloud flows orchestrate actions, approvals and connectors; they do not ground a copilot's answers in SharePoint documents. A flow could trigger after a response, but retrieval requires a knowledge source. Power Automate is correct when the requirement is automating a business process, not supplying conversational knowledge.
- ✗
Copilot for Microsoft 365
Why it's wrong here
Copilot for Microsoft 365 is a prebuilt assistant surfacing Microsoft Graph data inside Office apps; it cannot be authored as a custom copilot grounded on selected SharePoint documents. Microsoft Copilot Studio is required to build that. Copilot for Microsoft 365 suits organisations wanting ready-made productivity assistance without custom knowledge scoping.
- ✓
Add a knowledge source
Why this is correct
Adding a knowledge source lets the copilot ground its answers in specified SharePoint documents, retrieving content at query time rather than relying on the model's pretrained knowledge. This satisfies the requirement to answer IT policy questions from existing SharePoint content.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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