mediumMultiple ChoiceObjective-mapped
PL-900 Practice Question: A non-profit organization uses Power Automate to…
A non-profit organization uses Power Automate to send thank-you emails to donors after a donation is recorded in a SharePoint list. The flow is triggered when a new item is added. Recently, the flow has been failing intermittently with a '400 Bad Request' error. The SharePoint list has columns: DonorName, Email, Amount, Date. The flow uses the 'Send an email (V2)' action. The IT volunteer who set up the flow is unavailable. The organization needs a quick resolution. What is the most likely cause of the error?
⚠ Common exam trap
The PL-900 exam often tests the distinction between HTTP error codes (400 vs. 500 series) and their root causes, so the trap here is that candidates may incorrectly attribute the error to a server-side issue (like email server down) or a trigger misconfiguration, rather than recognizing that 400 errors are client-side and related to invalid input in the action parameters.
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
✓
The 'Send an email' action is using an invalid email address
The '400 Bad Request' error in Power Automate's 'Send an email (V2)' action typically indicates that the email server rejected the request due to a malformed or invalid recipient address. Since the flow dynamically pulls the email from the SharePoint list's 'Email' column, a missing, misspelled, or improperly formatted email address (e.g., missing '@' or domain) would cause the SMTP server to return a 400 status. This is the most common cause in donation-tracking scenarios where manual data entry may introduce errors.
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 issues would cause different errors.
- ✗
The SharePoint list is full
Why it's wrong here
SharePoint lists have large limits; 400 error is not about capacity.
- ✓
The 'Send an email' action is using an invalid email address
Why this is correct
400 errors often come from invalid email format or missing address.
- ✗
The organization's email server is down
Why it's wrong here
Email server down would give a different error (e.g., 503).
Go deeper
Related to this question
About these practice questions
Courseiva writes every PL-900 question from scratch — 904 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PL-900 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-900 exam.