I am currently transferring a new customer onto my virtual private server from their old host. They have an existing SSL certificate but it expires next month so I don't think it is worth the hassle of getting the details from the old host.
Would there be any issue with purchasing a new SSL (even if it's from the same authority) whilst they have an existing, unexpired, SSL?
Best Answer
You can just request a new certificate, and run both certificates at the same time.
In fact this is quite common for applications that need to be allowed to run without downtime, that require new certificates.
If you install both on one server, the old certificate will be ignored, in favor of the new one.
Datasprings has a nice write-up about certificate renewal.