The correct answer is that the data source requires OAuth authentication, and the refresh token has expired. When a Power BI dataset uses OAuth for data source credentials, the initial authentication grants both an access token and a refresh token, but the refresh token itself has a finite lifespan—often 90 days or less depending on the service. Once that refresh token expires, Power BI can no longer silently renew the access token during a scheduled refresh, causing the "credentials invalid" error even though the user manually verifies their credentials are correct. On the PL-300 exam, this scenario tests your understanding of how OAuth token lifecycle differs from static credentials; a common trap is assuming the user must re-enter the same password, when in fact they need to re-authenticate via the OAuth flow to issue a new refresh token. Remember the mnemonic: "OAuth tokens have a shelf life—when the refresh token dies, the scheduled refresh cries."
PL-300 Manage and secure Power BI Practice Question
This PL-300 practice question tests your understanding of manage and secure power bi. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You are a Power BI administrator. A user reports that their scheduled data refresh fails every day with the error 'The credentials provided for the data source are invalid.' The user has verified the credentials are correct. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The data source requires OAuth authentication, and the refresh token has expired.
Option D is correct because if the data source uses OAuth, the refresh token may expire and need to be refreshed. Option A is wrong because the gateway status would show a different error. Option B is wrong because the user already verified credentials. Option C is wrong because incremental refresh does not affect credential validity.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The user changed their password after configuring the refresh.
Why it's wrong here
The user verified the credentials are correct.
✓
The data source requires OAuth authentication, and the refresh token has expired.
Why this is correct
OAuth tokens expire; the user needs to re-authenticate the data source credentials in Power BI.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The on-premises data gateway is offline.
Why it's wrong here
If the gateway were offline, the error would indicate that.
✗
The dataset uses incremental refresh, which requires Premium capacity.
Why it's wrong here
Incremental refresh is not related to credential errors.
Common exam traps
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.
Detailed technical explanation
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which PL-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Manage and secure Power BI — This question tests Manage and secure Power BI — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The data source requires OAuth authentication, and the refresh token has expired. — Option D is correct because if the data source uses OAuth, the refresh token may expire and need to be refreshed. Option A is wrong because the gateway status would show a different error. Option B is wrong because the user already verified credentials. Option C is wrong because incremental refresh does not affect credential validity.
What should I do if I get this PL-300 question wrong?
Identify which PL-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This PL-300 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 PL-300 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.