I fixed this by upgrading to jdk 1.8.72 - score at xmpp.net is now A! The
Server uses Diffie-Hellman parameters of < 2048 bits
issue had to do with jdk 1.7. I did have to edit java.security again to exclude DH keySize < 2048. Hopefully openfire will continue to run well with jdk 1.8.
Regards,
SG