Question 1: can we read cookie from browser on login.fcc?
Ujwol => YES, you can read the cookie in login.fcc. Sample on how to do this is on the KB that I provided earlier :
Tech Tip : CA Single Sign-On : Web Agent : Pre-fill username during step up authentication
Question 2: if yes, how can we use that in domain policy to redirect on AuthAccept ?
Ujwol => No, the cookies are available only at the web server level, they aren't available for Policy server.
If you want to access this at the server side, you should look at FORM POST VARIABLE with which you can SAVE the custom attribute during login in the Variable which can be later used in the User Policy
Question 3: Can we use SP initiated Fed with #2 ?
Ujwol => Please clarify on this .
Question 4: if No, what is the alternative ?
Ujwol => Think we already discussed couple of alternatives here.