I have come across a problem with the security setting "Require SSL for all remote logins to cPanel, WHM and Webmail. This setting is recommended." With webmail, it always tries to redirect to port 2096. Eg, if you have example.com and go to https://webmail.example.com, it will try to redirect you to https://webmail.example.com:2096 even though it's already using SSL. This results in users behind a firewall being unable to access webmail. Turning off this option restores normal functionality.
I have only tried this with webmail. I haven't tried cpanel or whm.
I have only tried this with webmail. I haven't tried cpanel or whm.