The Citrix XML Service is used by user devices connecting over the
TCP/IP + HTTP protocol and the Web Interface.
By default, XenApp server role installation configures the Citrix XML
Service and Internet Information Service (IIS) to share the same TCP/IP port
(80) for communications. In this case, you cannot change the XML Service
During the installation of Citrix XenApp on your server, you
configured the XML Service to either share the port with your Microsoft
Internet Information Server or to use a particular port. For details about the
XenApp and Web Server (IIS) server roles, refer to the
System Requirements topic for your version of XenApp.
If you specified a custom XML Service port during installation, you
can change the XML port number if necessary.
Note: The port option appears only if you entered a different port number
than the default
Share with IIS during the Web Interface
installation. Use the
XML Service policy setting to change the port