PK0-005 Practice Question: Basics of IT Infrastructure and IT Project Management
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?
⚠ Common exam trap
A common mix-up: 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.
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
✓
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.
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
Forwarding rules do not fix MX records, so external senders still route mail to the old servers; the DNS entries must be corrected first. It is tempting as a quick per-user workaround, and would suit temporary mail redirection while MX propagation completes.
- ✗
Set up an SMTP relay on the old server.
Why it's wrong here
An SMTP relay on the old server does not correct the MX records, so inbound mail for those domains still routes to the decommissioned service. Relays are for outbound routing or smart-host forwarding, and would be the right choice when a legacy application cannot authenticate directly to the cloud service.
- ✓
Update the DNS records and wait for propagation.
Why this is correct
Incorrect MX records mean sending mail servers cannot locate the new service, so delivery fails regardless of server health. Updating the DNS records to point at the cloud service and allowing propagation restores routing, which is the prerequisite for any further delivery testing.
- ✗
Revert the migration to the on-premises system.
Why it's wrong here
Reverting discards a completed cutover and does not correct the DNS records causing the delivery failures; the MX records still point to the old service. It is tempting as a rollback safety net, and would be right if the cloud service itself were failing rather than the DNS configuration.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PK0-005 practice question is part of Courseiva's free CompTIA 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 PK0-005 exam.