SSO dosent work on Online plug-in v.12 here is the fix
With the release of the new 12.0 Online Plug-in for windows client, Single Sign On (SSON) might not work as it did in previous releases. As a result, SSON appears to not be configurable in the 12.0 client. This issue only affects customers using the Web Client and Web Interface; it does not affect Program Neighborhood Agent users. Citrix is working on a permanent solution
A temporary solution from Citrix:
Apply a regkey+add the webinterface to the clients trusted sites in the Internet browser.
Download the regkey here http://support.citrix.com/article/CTX124871
Luis Muga
I solved this issue, changing the Network Provider Priority. In advanced config of Network. The priority is:
“Microsoft Terminal Server”
“Microsoft Windows Network”
“Citrix Single Sign-on”
…
Normally in Laptops, the digital fingerprint, install a Provider and have a higher priority than the Citrix Single Sign-on.
Good luck!