The answer is that the SharePoint connection used in the flow does not have write permissions. This is the most likely cause because the error message specifically indicates a permission failure when the flow attempts to write data to the SharePoint list, even though the trigger and HTTP request URL validated successfully at design time. On the Microsoft Power Platform Fundamentals PL-900 exam, this scenario tests your understanding of how Power Automate connections inherit user permissions—a common trap is assuming the flow itself has inherent access, when in reality it relies on the connection owner’s rights. Remember that a flow can read a list but still fail on write if the connection lacks edit or contribute permissions. To avoid this, always verify that the SharePoint connection used in the flow has at least contribute-level access to the target list or library. A simple memory tip: “Read runs, write rights—if it fails, check the connection’s lights.”
PL-900 Practice Question: Identify foundational components of Power Platform
This PL-900 practice question tests your understanding of identify foundational components of power platform. 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.
Exhibit
Error: The flow 'Send Approval' failed. Action 'Send_an_HTTP_request_to_SharePoint' returned an unsupported status code '403'. The caller does not have permission to perform the action.
Refer to the exhibit. A Power Automate flow fails with the error shown. 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.
Error: The flow 'Send Approval' failed. Action 'Send_an_HTTP_request_to_SharePoint' returned an unsupported status code '403'. The caller does not have permission to perform the action.
A
The flow trigger is misconfigured
Why wrong: Trigger errors would be different.
B
The SharePoint site is offline
Why wrong: 403 is a permission issue, not offline.
C
The SharePoint connection used in the flow does not have write permissions
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The SharePoint connection used in the flow does not have write permissions
The error message indicates a permission issue when the flow attempts to write to the SharePoint list. Since the flow trigger and HTTP request URL are validated at design time and the SharePoint site is accessible (the flow runs but fails), the most likely cause is that the SharePoint connection used in the flow lacks write permissions on the target list or library.
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 flow trigger is misconfigured
Why it's wrong here
Trigger errors would be different.
✗
The SharePoint site is offline
Why it's wrong here
403 is a permission issue, not offline.
✓
The SharePoint connection used in the flow does not have write permissions
Why this is correct
403 indicates lack of permission.
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 HTTP request URL is malformed
Why it's wrong here
Malformed URL would give 400, not 403.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume a flow failure is due to a misconfigured trigger or a malformed URL, but the error message explicitly points to a permission issue, which is a common oversight when reusing connections across environments or after permission changes.
Detailed technical explanation
How to think about this question
Power Automate uses OAuth 2.0 to authenticate connections to SharePoint. When a flow action attempts to write (create, update, or delete) to a SharePoint list, the connection token must include the necessary delegated permissions (e.g., Sites.ReadWrite.All) and the user or service principal must have at least Contribute or Edit permissions on the specific list or library. If the connection was created with read-only permissions or the user's permissions have been revoked, the flow will fail with a 403 Forbidden or similar permission error, even if the trigger and URL are correct.
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.
TExam Day Tips
→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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Identify foundational components of Power Platform — This question tests Identify foundational components of Power Platform — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The SharePoint connection used in the flow does not have write permissions — The error message indicates a permission issue when the flow attempts to write to the SharePoint list. Since the flow trigger and HTTP request URL are validated at design time and the SharePoint site is accessible (the flow runs but fails), the most likely cause is that the SharePoint connection used in the flow lacks write permissions on the target list or library.
What should I do if I get this PL-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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.
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