Mark,

the one million dollar question is, why did you receive a P7B file? P7B files only contain certificates and chain certificates (Intermediate CAs), not the private keys. As far as I know, all WebTrusts provide .PFX files by default.

http://www.lindersoft.com/forums/sho...e-process-2020

https://www.setupbuilder.com/downloads/Comodo2020.pdf

Friedrich