I just set up the CNAME record and it's not working
It can take up to 48 hours for a CNAME record to propagate - You can verify that the CNAME has been added by visiting http://www.whatsmydns.net.
It's showing the Duda dashboard instead
Normally this happens when the set-up isn't correct. Contact firstname.lastname@example.org if you experience this issue.
I change the domain name and now my clients can't access their sites
Changing the domain name will render the previous URL unusable - To fix this, simply give your clients your new URL.