ASA+Win2012 AD authentication interface issue

[dfdong001]

Dear all:

    I have setup ASA 5555 and a LDAP server(win2012 AD)  to implement NAC control, which will used to ask a extra username/password authentication when the follow pass the ASA.

    The authentication works well for now, but the interface are not perfect. It was expected to show some authentication success information as I tested in the 2012 server,
but it show time out and display no information.

  is there anyway to adjust the parameters on the ASA to make it display authentication success  on users laptop IE?

[dfdong001]

1) Is there any support provided for uploading our own custom login pages to the ASA appliance? e.g. flash embeded html page 2) Can the ASA appliance be configured to redirect the authentication to a specific URL (our external web server which will do some means of authentication) and if successfully authenticated then our webserver will post the credentials back to the appliance login page. This way it will support multi-factor authentication.