Steps to Fix Enable site system roles for HTTPS or Enhanced HTTP warning
1.HTTPS or Enhanced HTTP are not enabled for client communication – When I viewed the Communication Security tab of my site properties, the communication method was set to HTTPS or HTTP. Microsoft either wants you to select HTTPS only or Enhanced HTTP.
2.HTTP-only communication is deprecated and support will be removed in a future version of Configuration Manager – This is a change introduced in SCCM 2103 and going forward this will apply to all the Configuration Manager current branch releases.
3.Enable a more secure communication method for the site either by enabling HTTPS or Enhanced HTTP – To fix this warning, select HTTPS only or enhanced HTTP. If you have PKI certificates for SCCM, select HTTPS only. Other wise select Use Configuration Manager generated certificates for HTTP site systems.