Fusion can talk to Citrix through web services

Question

Fusion built applications can launch and enumerate published applications on Citrix Presentation Server using Extentrix Web Services for Citrix Presentation Server. Being built on SOAP protocol, XML and WSDL, Extentrix Web Services for Citrix Presentation Server represents a standard way to communicate with the Citrix application delivery platform.
For more information please check http://www.extentrix.com/web%20services/. There are examples written in Oracle Jdeveloper available on the website at http://www.extentrix.com/web%20services/Download.htm

Answer 1

http://www.isaserver.org/articles-tutorials/general/Publishing-Microsoft-SharePoint-2010-Forefront-TMG-different-authentication-options-Part2.html
If a published Web server like the SharePoint needs to authenticate a user that sends a request to it and if the Forefront TMG computer cannot delegate authentication to the published Web server by passing user credentials to the published Web server or
impersonating the user, the published Web server will request the user to provide credentials for a second time. ISA Server 2006 introduced support for Kerberos constrained delegation to enable published Web servers to authenticate users by Kerberos, after
their identity has been verified by the ISA Server using a non-Kerberos authentication method. When used in this way, Kerberos constrained delegation eliminates the need for requiring users to provide credentials twice. To get Kerberos Constrained Delegation
to work, we must change the Authentication Delegation method to Kerberos Constrained Delegation in the Forefront TMG Management console for the SharePoint publishing rule. The Service Principal Name (SPN) is host/InternalDNSFQDN of the SharePoint Server.
http://msdn.microsoft.com/en-us/library/office/gg430121%28v=office.12%29.aspx
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