Few suggestions
Under your DNS and a CName record to make your subdomain point to the credential system server at app.certifyme.online. For example, if you had chosen your subdomain as “certificate.yourdomain.com”, below should be your CName records. (You might need your IT team’s help )
certificate.yourdomain.com app.certifyme.online
Your custom domain is activated immediately, but for the mapping to be effective, you have to add the right CNAME in your domain’s DNS records. How you add a CNAME to your DNS records depends on your hosting service.
Here’s a brief guide to setting up a CNAME with GoDaddy:
Click here to learn how set up a CNAME with Google Domains
Mapping
certificate.yourdomain.com ---> app.certifyme.online
Click here to learn how set up a CNAME with BigRock
Mapping
certificate.yourdomain.com ---> app.certifyme.online
CertifyMe helps trainers, teachers, event marketers, and HR professionals award verifiable digital Certificates and Badges with just a couple of clicks.