Step 1: Export a certificate from F5.
Please follow this procedure and run the following command line on the F5:
This will create a file on the F5 called filename.pfx.
You then need to move the file to your IIS web server.
Step 2: Import a .pfx file on the IIS Web Server.
For instructions on how to import the certificate on the IIS web server, please have a look at the following article:
How to import PKCS#12 (.pfx) certificate using Microsoft IIS 6.0, 7.0 or 8.0 server: SO18970