# Step 3 — Set up DNS after installation

> Add the 2 CNAME records the platform emails you and verify your domain — within 3 days, before the AWS certificate expires.

How-to guide · Platform Installation › Install the platform · Last updated 25 September 2026

URL: https://personalisationhub.com/support-centre/platform-installation/step-3-set-up-dns-after-installation/

When installation finishes, the platform sends the Master Admin two CNAME records that point your platform domain at the new instance. Add them to your DNS, then verify the domain in the Installation Wizard.

> **Warning:** AWS issues the certificate for your platform domain with a 3-day lifetime. If the DNS records are not in place and verified before it expires, the domain cannot be verified and Personalisation Hub support has to reissue it.

## Before you begin

- Installation has finished and the Master Admin has received the email **Personalisation Hub - Installation Complete > Next Step: DNS Set-Up**.
- Access to the DNS for your platform domain — in practice, your webmaster or IT team. If you serve the domain through a CDN, the records go behind it.

## Steps

1. Open the **Installation Complete** email. It contains the 2 CNAME records to add, and the Installation Wizard shows a countdown to certificate expiry.
2. Forward the email to whoever manages your DNS.
3. Add both CNAME records exactly as given, for the platform domain you chose during installation (for example `ph.yourdomain.com`).
4. In the Installation Wizard, select **Verify Domain**.

## Verify it worked

The Master Admin receives a second email, **Personalisation Hub DNS has been set up > Final Step: Login & Add Users**. Your platform domain now loads the Personalisation Hub sign-in page over HTTPS.

## Troubleshooting

### Verify Domain keeps failing

**Cause.** The records have not propagated yet, or one of them was entered against the wrong host.

**Fix.** Check both records match the email character for character, including the trailing dot if your DNS provider adds one, then wait and select **Verify Domain** again.

### The countdown reached zero before the records were live

**Cause.** The AWS certificate expired after 3 days.

**Fix.** Contact Personalisation Hub support to have the certificate reissued. The installation itself is unaffected.

## Next step

[Step 4 — First login and platform set-up](https://personalisationhub.com/support-centre/platform-installation/step-4-first-login-and-platform-set-up/)

## Related

- [Step 2 — Run the Installation Wizard](https://personalisationhub.com/support-centre/platform-installation/step-2-run-the-installation-wizard/)
- [Pre-installation checklist](https://personalisationhub.com/support-centre/getting-started/pre-installation-checklist/)