ms/https_port is a SAP Parameter attribute which is used to control Port where HTTPS requests arrive information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
Caution
This parameter is obsolete and should no longer be used. Use parameter
ms/server_port instead.
Message server port at which HTTPS requests arrive. The syntax and
meaning are the same as for the parameter
See SAP Parameter Documentation for full SAP documentation for this profile parameter.