Is It Possible to Automate Certificate Renewal for Multiple Domains at Once?

Yes, it is indeed possible to automate the renewal of SSL certificates for multiple domains at once, which is a significant advantage for organizations managing numerous websites or digital assets. Here's how this can be achieved:

1. Automated Certificate Management Tools:
   Tools like DigiCert CertCentral® offer solutions to automate the certificate lifecycle management, including renewal, for any number of certificates within your ecosystem . This includes both on-premises and hosted options, providing flexibility and scalability for larger organizations.
2. ACME Protocol:
   The Automatic Certificate Management Environment (ACME) protocol is designed to automate the process of obtaining, provisioning, and renewing TLS certificates. It simplifies the management of multiple domain certificates by allowing automation of TLS/SSL certificate provisioning, installation, and renewal .
3. Centralized Management Platforms:
   GlobalSign and Sectigo offer centralized platforms that can automate the deployment and renewal of TLS certificates, including support for multi-domain or wildcard certificates . These platforms can simplify the management of certificates across various domains, reducing the complexity and potential for errors.
4. Automated Renewal Features:
   Let's Encrypt, a free certificate authority, uses clients like Certbot to install, manage, and automatically renew certificates. This can be done for multiple domains by structuring commands to include all relevant domains . For example, a command like 'certbot -d domain1.tld,domain2.tld,*.domain3.tld' can be used to manage certificates for multiple domains efficiently.
5. Custom Automation Scripts:
   For organizations with specific needs, custom scripts can be developed to automate the renewal process. These scripts can interact with Certificate Authorities to renew certificates, update DNS records for validation, and install new certificates across multiple servers and domains.
6. Integration with Web Servers:
   Some web server platforms offer built-in or third-party plugins that can automate the SSL certificate renewal process, checking expiration dates, and triggering the renewal without manual intervention.

By leveraging these tools and protocols, organizations can ensure that all their domains maintain valid SSL certificates, enhancing security and trust while reducing the administrative burden. Automating SSL certificate renewal for multiple domains not only saves time but also minimizes the risk of service disruptions due to expired certificates.