Hi @schoen,
The test was run https://www.ssllabs.com/ssitest/ and an “A” was received. Marking solved!
This thread was helpful
(1) This server's certificate chain is incomplete. Grade capped to B. openshift
Which stated the “intermediate” certificate was in the file chain.pem.
(2) Also helpful was https://www.ssllabs.com/ssltest/ which gives a plethora of seemingly encrypted information to decipher.
(3) Apache 2.4 virtual host configuration
<VirturalHost *:443 > (or what ever)
SSLCertificateFile …/cert.pem
SSLCertificateKeyFile …/privkey.pem
SSLCertificateChainFile …/chain.pem (the intermediate cert)