Hello
You mentioned that you are not able to enable Centrify Express using the Keychain. Are you saying that the Smartcard, once inserted does light up on the reader, but is not showing in the keychain?
This article explains the cleanup which may be needed to get the reader to work;
http://community.centrify.com/t5/Centrify-Express/Please-Help/m-p/18829#U18829
Or are you referringto not being able to import the needed SystemCACertificate keychain? This walks you through how to import this:
https://www.youtube.com/watch?v=NfLgRPi9iT4
If you still are having issues, please let us know the model of the reader, as well as the step you are stuck at. (not seeing in the keychain when inserted, cannot import SystemCACertificate keychain, etc.) Please let me know if the Reader has lights when card is inserted also.
This article has the steps needed to troubleshoot and solve most issues with Smart cards and the Centrify Express product.
I hope this helps!
Have a great day!
Thank you!
Ryan V