Create SSL Cert with AWS Certificate Manager

Add the Domain for the Marketplace Central application and select the DNS Validation

Save the CNAME name and CNAME Value

Logi into Route 53 Account (likely Management Account)

Navigate to your Hosted Zone and Create a new A Record

Add the DNS Entries to the subdomain from the what was saved and the Value to Validate the SSL Certificate.

In approxiately 5 to 10 minutes the Certificate in the Marketplace Central Account will show as Validated and able to be added to Distbitution.