Exporting a SSL certificate as a PFX will allow it to be imported on any other server running Windows or Linux. To export a certificate using Windows: 

1)Click Start.

2)Click Run.

3)Type “mmc” without quotes.

4)Press Enter.

A box will come up.

5) Click File.

6) Click Add/Remove Snap-in.

7) Click the Add button.

8) Scroll down till you find the container that says Certificates.

9) Highlight Certificates and press add.

10) Click on Computer Account then Next.

11) Select local computer then finish.

12) Click close on the box below it.

13) Click Ok.

Certificates (Local Computer) should now be seen under the Console root.  Expand certificates and then expand personal. Locate the certificate that will be exported.

14) Right click on the certificate and go to all tasks export.

15) Click next.

16) Select Personal Information Exchange, Include all certificates in path, and enable strong protection.

17) Enter a password (you will need this to do the import).

18) Save it to wherever.

19) Then close out of everything and copy the file to the other server. Importing is different depending on the Operating System and other factors. For windows the above steps can be used to Import a certificate.