The correct first step is to update the DNS records and wait for propagation. This is because the MX records still point to the old on-premises mail server, so sending mail servers cannot route messages to the new cloud service; updating these records restores proper email routing at the DNS level, and propagation typically takes 1–48 hours depending on the TTL. On the CompTIA Project+ PK0-005 exam, this scenario tests your ability to identify DNS configuration issues as a root cause during a project cutover, often appearing as a troubleshooting question where the team mistakenly checks server logs first. A common trap is to assume a server-side error or to re-run the migration, but since no server errors exist, the focus must be on DNS. Memory tip: think “MX before mail” — if mail fails, check the MX records first.
PK0-005 Practice Question: Basics of IT Infrastructure and IT Project Management
This PK0-005 practice question tests your understanding of basics of it infrastructure and it project management. 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 project to migrate on-premises email to a cloud-based service is nearing completion. After the final cutover, some users report that emails sent to certain domains are not being delivered. The project team checks the mail servers and finds no errors. The project manager reviews the DNS records and discovers that the MX records were not updated to point to the new service. What should the team do first?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Update the DNS records and wait for propagation.
The root cause is that the MX records in DNS still point to the old on-premises mail server, so sending mail servers cannot route messages to the new cloud service. Updating the MX records to point to the new service and waiting for DNS propagation (typically 1–48 hours depending on TTL) is the correct first step because it restores proper email routing at the DNS level. No server-side errors exist, so the issue is purely a DNS configuration problem.
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.
✗
Configure manual email forwarding rules.
Why it's wrong here
Manual forwarding is not scalable and does not address the underlying DNS issue.
✗
Set up an SMTP relay on the old server.
Why it's wrong here
A relay bypasses the proper mail flow and is a temporary fix that may cause other issues.
✓
Update the DNS records and wait for propagation.
Why this is correct
Correcting the MX records ensures email routes to the new service; propagation typically completes within hours.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Revert the migration to the on-premises system.
Why it's wrong here
Reverting is unnecessary once DNS is corrected and would cause further disruption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume a server-side configuration error (like SMTP relay or forwarding) is needed, but the question explicitly states no server errors exist, so the correct first action is to fix the DNS records rather than applying a workaround or reverting the project.
Detailed technical explanation
How to think about this question
MX records use a priority (preference) value; when a sending MTA queries DNS, it receives a list of mail exchange servers and attempts delivery to the lowest-priority host. If the MX record is not updated, the sending MTA will attempt to connect to the old on-premises server, which may reject the connection or return a 550 error if it no longer accepts mail for that domain. DNS propagation delay is governed by the TTL (Time to Live) set on the MX record; a common mistake is setting a very long TTL (e.g., 86400 seconds) before cutover, which forces a longer wait for full propagation.
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 practitioner preparing for the PK0-005 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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.
Basics of IT Infrastructure and IT Project Management — This question tests Basics of IT Infrastructure and IT Project Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Update the DNS records and wait for propagation. — The root cause is that the MX records in DNS still point to the old on-premises mail server, so sending mail servers cannot route messages to the new cloud service. Updating the MX records to point to the new service and waiting for DNS propagation (typically 1–48 hours depending on TTL) is the correct first step because it restores proper email routing at the DNS level. No server-side errors exist, so the issue is purely a DNS configuration problem.
What should I do if I get this PK0-005 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: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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