SSL installation for multiple server

I have 1 domain, let say mydomain.com, and I use it for many servers of mine. Each server has a different name (hostname), I purchased 1 SSL certificate, how can I install on all of them.
Ex. of my server names:
server1.mydomain.com
server2.mydomain.com

I installed successfully for server1, so my SSL is https://www.mydomain.com
But how can I install on different server with the same domain? Can I do that?
Thanks

 

 

 

 

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