We get asked the following question a lot in this industry: “Can I use one SSL certificate on multiple domains?” No matter what language you speak, no matter what industry you work in, the answer is still the same: Yes, you can use one SSL certificate for multiple domains on the same server.
How to Set Up Multiple SSL Certificates on One IP
Before a transport layer security (TLS) extension called Server Name Indication (SNI) was published, secure sockets layer (SSL) certificates were limited to organization validation (OV) SSL certificates that secured an IP address. For a website to use SSL, it needed a dedicated IP. Today, that couldn’t be further from the truth.
Can you have multiple SSL certificates for one domain?
You can install multiple SSL certificates on a domain, but first a word of caution
A lot of people want to know whether you can install multiple SSL certificates on a single domain. The answer is yes. And there are plenty of websites that do. But before you try to install multiple SSL certificates on one domain there are some things you should know first.