An administrator is installing an LDAP browser tool in order to view objects in the corporate LDAP directory. Secure connections to the LDAP server are required. When the browser connects to the server, certificate errors are being displayed, and then the connection is terminated. Which of the following is the most likely solution?

The correct answer is that the administrator needs to install the server certificate into the local truststore. Certificate errors and connection termination when using secure LDAP (LDAPS) typically indicate that the client (the LDAP browser) does not trust the certificate presented by the LDAP server. Installing the server's certificate (or the certificate of the Certificate Authority that issued it) into the client's local truststore establishes this trust, allowing the secure connection to proceed without errors. Allowing SAN certificates is not the most likely solution because while SANs are used for multiple domain names, the core issue here is trust, not the certificate's subject alternative names. Requesting the secure LDAP port to be opened is incorrect because the connection is being attempted, implying the port is already open, but it's failing due to trust, not connectivity. Increasing the TLS version on the organization's RA is irrelevant to this specific problem, as the RA (Registration Authority) handles certificate requests, not client trust of server certificates.