Some leading practices regarding SSL certificates for Career Site Builder (CSB) sites are:

It is critical to prevent the SSL certificate from expiring so that candidates are not blocked from accessing the CSB site.An expired SSL certificate will cause security warnings and errors for the candidates and may damage the reputation and trust of the company1.

Rather than setting up a certificate specifically for the CSB subdomain, a wildcard certificate can be used. A wildcard certificate is a certificate that covers multiple subdomains under the same domain name, such as *.example.com.This will save time and cost for the customer and simplify the certificate management process2.

SSL certificates must be installed for both the stage and production CSB environments.This will ensure that the CSB site is secure and functional in both environments and allow for testing and validation before moving to production3.

The other options are not valid leading practices regarding SSL certificates for CSB sites:

Using CSB, customers and consultants can manage the entire SSL certificate renewal process without assistance from Product Support. This is not true, as the SSL certificate renewal process requires coordination and communication between the customer, the certificate authority, and the Product Support team. The customer or consultant can initiate the renewal request in CSB, but they still need to provide the certificate files and information to Product Support for installation.

The implementation consultant begins the SSL certificate process as soon as the site is moved to production. This is not a leading practice, as the SSL certificate process should be started as early as possible in the project timeline, preferably during the design phase. This will allow enough time for the certificate procurement, installation, and testing, and avoid any delays or issues in the go-live phase.

References:1:SAP Help Portal - SSL Certificate Expiration2:SAP Help Portal - Wildcard SSL Certificate3:SAP Help Portal - SSL Certificate Installation: [SAP Help Portal - SSL Certificate Renewal] : [SAP Help Portal - SSL Certificate Process]