During iFolder installation, if the certificate that you import to the iFolder server certificate store expires or if you change the certificate for the LDAP server, you will receive the following error when you attempt to login to the Web admin or Web access console:
Failed to authenticate, problem with Ldap or iFolder server certificate.
Consequently, iFolder will log appropriate error messages in the simias debug log. To successfully login again to the web admin or web access console, you must import the new certificate. To do this, run the ldap-cert-update tool from the <iFolder install path>/bin location.
This tool automatically detects the iFolder data path and the LDAP URL to fetch new certificates from. The tool displays the new certificate (if it is already changed on server) and enables you to import the same.