How to configure custom domain on Intercom

intermediate 8 min read Updated 2026-03-18

Quick Answer

Configure a custom domain on Intercom by accessing Settings > Workspace > Custom Domain, entering your domain details, and updating your DNS records with the provided CNAME values. Verify the setup and enable SSL to complete the configuration.

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Prerequisites

Active Intercom account with admin access
Custom domain ownership and DNS management access
SSL certificate for your domain
Basic understanding of DNS records

Step-by-Step Instructions

Access Custom Domain Settings

Log into your Intercom workspace and navigate to Settings in the left sidebar. Click on Workspace and then select Custom Domain from the menu options.

Ensure you have admin permissions as only workspace admins can configure custom domains.

Enter Your Custom Domain

In the Custom Domain section, click Add Custom Domain. Enter your desired subdomain (e.g., help.yourcompany.com) in the domain field and click Add Domain.

Use a subdomain like 'help' or 'support' rather than your main domain for better organization.

Configure DNS Records

Copy the CNAME record values provided by Intercom. Go to your DNS provider's control panel and create a new CNAME record:

Name/Host: Your subdomain (e.g., help)
Value/Points to: The CNAME value from Intercom
TTL: 300 seconds (or lowest available)

DNS changes can take up to 48 hours to propagate, but usually complete within 15-30 minutes.

Verify Domain Configuration

Return to Intercom and click Verify Domain next to your added domain. Intercom will check if the DNS records are properly configured. Wait for the status to change to Verified.

If verification fails, double-check your DNS records for typos and wait a few more minutes before retrying.

Enable SSL Certificate

Once verified, click Enable SSL to activate HTTPS for your custom domain. Intercom will automatically provision and install an SSL certificate for your domain.

SSL provisioning usually takes 5-10 minutes but can take up to an hour in some cases.

Update Help Center Settings

Go to Settings > Help Center > General and ensure your custom domain is selected in the Domain dropdown. Save the changes to activate your custom domain.

Test Your Custom Domain

Visit your custom domain URL (e.g., https://help.yourcompany.com) to verify it's working correctly. Check that all pages load properly and the SSL certificate shows as secure in your browser.

Clear your browser cache if you see any old content or SSL warnings during testing.

Common Issues & Troubleshooting

Domain verification fails after adding DNS records

Check that your CNAME record exactly matches the value provided by Intercom. Remove any trailing dots and ensure there are no extra spaces. Wait 30 minutes and try verification again.

SSL certificate won't enable or shows as failed

Ensure your domain is fully verified first. Check that your DNS records are propagated using a tool like dig or online DNS checkers. Contact your DNS provider if records aren't updating.

Custom domain shows 'Not Found' or 404 error

Verify that your Help Center is published and the custom domain is selected in Help Center settings. Check that the CNAME points to the correct Intercom endpoint.

Mixed content warnings on custom domain

Ensure all embedded content (images, scripts) uses HTTPS URLs. Check your Help Center customizations and remove any HTTP references in custom CSS or JavaScript.

Prices mentioned in this guide are pulled from current plan data and may change. Always verify on the official Intercom website before purchasing.

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