You only need to configure Certificate Authority Authorization (CAA) DNS records whenever you're using your own origin web server SSL certificate instead of Cloudflare Universal SSL.
When using Universal SSL, do not configure CAA records
When you enable Universal SSL and add CAA records via the Cloudflare DNS app, Cloudflare automatically adds three additional CAA DNS records for each of our Universal SSL CA providers. Cloudflare does not append additional CAA records if Universal SSL is disabled or if no CAA records are added via the DNS app.
If you don't want or need Cloudflare Universal SSL, you can disable it in your Cloudflare SSL/TLS settings. Disabling SSL automatically deletes the CAA DNS records for our official providers, mentioned above.
When using your own certificate, configure your CAA records
If you're using your own origin server SSL certificate (that is, a certificate that was not provisioned by Cloudflare), you need to manually add a CAA DNS record for each Certificate Authority (CA) that you plan to use for your domain.
To add a CAA record:
1. Log in to the Cloudflare dashboard.
2. Ensure the website you want to update is selected.
3. Click the DNS app.
4. In the DNS Records panel, click Add record.
5. Choose CAA from the Type field to display the required CAA record details.
6. In the Name text box, type your domain.
7. Click Tag. Choose to Only allow specific hostnames, Only allow wildcards, or Send violation reports to URL from the dropdown. The default tag is Only allow specific hostnames.
8. Enter the CA name in the CA domain name text box.
9. Click Save to save your CAA record.
You can repeat the steps above for each CA to associate with your domain. Once you have finished creating all the records, you can review them in the list of records appearing under the DNS Records panel.