The answer is that the email account used in the 'Send an email (V2)' action has been deactivated or its credentials have changed. This is because Power Automate establishes a connection to an email server using stored credentials; when the flow runs and the action reports "Succeeded," it only confirms that the action was executed and the email was handed off to the server, not that the server actually authenticated and delivered it. If the underlying mailbox is disabled or the password has expired, the server silently rejects the send, yet the flow history still shows success. On the PL-900 exam, this scenario tests your understanding of connector authentication versus delivery confirmation—a common trap is assuming "Succeeded" means the recipient received the email. Remember the memory tip: "Succeeded means sent, not delivered—check the mailbox credentials first."
PL-900 Practice Question: Demonstrate the capabilities of Power Automate
This PL-900 practice question tests your understanding of demonstrate the capabilities of power automate. 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.
A non-profit organization uses Power Automate to automatically send thank-you emails to donors after they make a donation through a third-party payment gateway. The flow is triggered when a new row is added to a Dataverse table named 'Donations'. The flow then uses the 'Send an email (V2)' action to send the email. The flow has been working for months, but today donors started complaining that they are not receiving the thank-you emails. The flow run history shows that the flow runs successfully and the 'Send an email' action shows 'Succeeded'. What is the most likely cause of the issue?
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 email account used in the 'Send an email' action has been deactivated or its credentials have changed
Option A is correct because the 'Send an email' action in Power Automate requires a connection to an email server; if the connection uses a shared mailbox or a service account, and that mailbox's credentials expire or the mailbox is deactivated, the flow will appear to succeed but the email will not be delivered. Option B is incorrect because if the email goes to spam, the flow would still show success. Option C is incorrect because the trigger is working. Option D is incorrect because the donor table is populated, so the flow runs.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 email account used in the 'Send an email' action has been deactivated or its credentials have changed
Why this is correct
If the sending mailbox is disabled, emails are not sent but the action may succeed.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The flow is not processing new donor records
Why it's wrong here
The flow runs successfully, so it is processing records.
✗
The donors' email addresses are invalid
Why it's wrong here
Invalid addresses would cause the action to fail, not succeed.
✗
The Dataverse table trigger is not firing
Why it's wrong here
The flow runs successfully, so the trigger is firing.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PL-900 NAT questions on configuration and troubleshooting.
Demonstrate the capabilities of Power Automate — This question tests Demonstrate the capabilities of Power Automate — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The email account used in the 'Send an email' action has been deactivated or its credentials have changed — Option A is correct because the 'Send an email' action in Power Automate requires a connection to an email server; if the connection uses a shared mailbox or a service account, and that mailbox's credentials expire or the mailbox is deactivated, the flow will appear to succeed but the email will not be delivered. Option B is incorrect because if the email goes to spam, the flow would still show success. Option C is incorrect because the trigger is working. Option D is incorrect because the donor table is populated, so the flow runs.
What should I do if I get this PL-900 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PL-900 NAT questions on configuration and troubleshooting.
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?
Static NAT maps one inside address to one outside address.
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