One of my new user was having this problem, whereas whenever he launched Citrix applications, the application launched within another window ( Windowception??? ). This issue was only occurred to him, but not to other users. Hence, it was safely said the issue is user-related, and not farm-wide. Issues : Application did not launch in Seamless mode, but inside another window session (in this case, the published application was Notepad). Troubleshooting  ** Note that these steps are to be taken from User ends, not the infra**  Ask the user to access Citrix Web Interface as usual.  Go to Preference > Session Settings  Take note on 'Window size:' column Resolution : Change current Window size to Seamless , and press Save . This is some Help notes provided by Citrix 

I received a request by my clients to enable pass-through to their Citrix Web Interface site. Not more than a few minutes after completion, they made a few complaints, saying that they needed to supply their credentials every time they launched published applications, which defeats the Single Sign-On (SSO) purposes. After a few minutes of troubleshooting, I realized that, in order to enable pass-through, there are more steps need to be taken, not simply enabling the feature. Description : Properly enabling Pass-Through, so users wot have to supply credentials every time they launched Citrix published applications, as below : How To Do :  Uninstall current installed Citrix Receiver Once un-installation completed, open command prompt, and type CMD  Browse to the installer location, and run command (  CitrixReceiver.exe /includeSSON )to install Receiver with SSON enabled Proceed with installation When you can see this in P