After upgrading to Sierra and I still had an older version of Express, it asked if I wanted to set up my system for CAC, CACNG, or PIV. If I chose PIV, will that screw up my system? Can I change that choice? I've since updated the Express after following all of the clean uninstall instructions, but I was never asked again what the choice was for the system.
I've notice a few strange behaviors, when asked to access my login keychain (to save a new password) if my card is in the reader, by username is greyed out and my password doesn't work. I pull the card out and it works. Also, in my login screen, believe it says pin instead of password if my card is in the reader. This makes be believe the system is set up for PIV.
I'm not sure if this the problem, but I can't access many any CAC enabled DOD sites. I also noticed that I don't have a SystemCACertificates.keychain. I've associated my problems with this missing keychain, but now I'm wondering if I screwed up my system by selecting PIV. I saw another post question about the SystemCACertificates so if someone has a solution to that problem, look for that thread instead.
Thanks for your help!