SSO not working for internal site through Secure Web
Homepage.html is modified to point an intranet site with Authenication.
 

Alternative solution provided which was requested Solution will be as follows:

1)Set the homepage parameter to nohomepage.html in the session profile

2)Enable login through native receiver. Please note that you will have access through browser once to make changes to VPN profile(Please have a look at the blog below) or you can try modifying the ini file within the users %APPDATA% folder.

For example
C:\Users\David\AppData\Local\Citrix\AGEE\ns1profile.ini
It contains in my case a few lines of options from which “native login” is the one we’re after:
[global]
current user=David
[David]
native login=0
 
Change native logon=0 to native logon=1

http://blogs.citrix.com/2013/01/11/access-gateway-native-logon-option-explained/

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Problem Cause

SSO is not supported for an HTTPS site published or part of the homepage in a full VPN setup. The challenge here is when the URL reaches the client, an end to end SSL session is created. Since it is HTTPS there is no way in which Netscaler can decrypt or see the back end communication.