If you use the MS Active Directory service for user authentication and your MSAD server requires secure connections, depending on how the server is configured you may be seeing a "Can't connect to server" error in the authentication test output. This can occur when your MSAD server is specified with ldaps:// or tls://.
This happens when the OpenLDAP libraries attempt to verify the server name in the certificate chain and can't.
You can configure your Orca Console server to not validate the certificate in this manner by adding a configuration setting to the OpenLDAP configuration.
Edit the file /etc/openldap/ldap.conf and add the following line to the file:
MSAD authentication should begin working without the need to restart any services.