DNS record in Cloudflare

Section A - Adding CNAME for a subdomain

1. In this case your custom domain will look like calendar.yourbusiness.com

2. Log in to your Cloudflare dashboard and select the site

3. Go to DNS -> Record

4. Click on Add record

5. Select CNAME as the Type

6. Add Name and Target

7. Disable Proxy status and enable Flatten

8. Click Save

9. For more information refer official documentation

Section B - Adding CNAME for a root domain

1. In this case your custom domain will look like yourbusiness.com

2. Follow the same steps mentioned above