This property indicates the port number on which the Web service is running on the target machine. Some versions of the IIS Web server can host multiple Web sites. Each Web site is associated with a unique port number.

The default value for this property is 80. In cases where you do not know the port number on the target machine, you should leave the default 80 value in this field. When the value is 80, InstallShield uses the default Web site on the target machine and creates all Virtual Directories under this Web site.