Microsoft Exchange 2013 iApp - Can't login to OWA or ECP if more than one server is active in pool

Both our wildcard and the exchange certs we used had CSR's generated from the F5, the submitted to Thawte, then the issued certs from them were installed on F5. To get them on the servers, I exported the .crt and .key files and used OpenSSL to combine them to install on Exchange servers. That would be ok right?