Problem: None of our users (including admin@system-domain) could log in via the web client. The normal vSphere client was accepting logins.   Looking at the vsphere_client_virgo.log file in C:\Program Files\VMware\Infrastructure\SSOServer\security\ we could see the following error: [2013-11-21 10:55:57.553] ERROR [ERROR] http-bio-9443-exec-29        9D007B355802AF829F8A1DF1B5D4EFD6 com.vmware.vsphere.client.security.sso.SsoAuthenticationHandler   Error during authentication com.vmware.vise.vim.security.sso.exception.SsoServiceException: java.security.cert.CertificateExpiredException: certificate expired on 20131107113017GMT+00:00   All Read More…