I use a smart card to access military websites and Outlook (OWA).
Normally I'll put my card in, go to the site, get prompted to select which certificate I want, then enter my PIN.
Yesterday morning it was working fine, but later in the day my system stopped prompting me for a certificate. I restarted the browser but there was no change. I restarted the laptop but again no change. I tried clearing cookies and cache, SSL state, even removing the certificates from the Content tab of Internet options.
Today I brought my other laptop to work and it worked fine all morning, prompting me as necessary as I visited the sites I needed to. This afternoon the second laptop also stopped prompting me for my certificate even after restarting the browser.
I've tried using IE, Edge, and Chrome, but none of them bring up the certificate prompt when visiting a site that requires a CAC (smartcard).
Both laptops use Windows 10 64-bit. Chrome is 84.0.4147.105 (Official Build) (64-bit). IE is 11.959.18362.0. Edge is 44.18362.449.0.