public boolean verifyCertificateValidity()
    {
        // TODO these are new properties! Deprecate (migrate?) all existing 'verify / verify-validity properties' (Eg: org.jivesoftware.openfire.session.ConnectionSettings.Server.TLS_CERTIFICATE_VERIFY_VALIDITY )
        final String propertyName = type.getPrefix() + "certificate.verify.validity";
        final boolean defaultValue = true;

        if ( type.getFallback() == null )
        {
            return JiveGlobals.getBooleanProperty( propertyName, defaultValue );
        }
        else
        {
            return JiveGlobals.getBooleanProperty( propertyName, getConnectionListener( type.getFallback() ).verifyCertificateValidity() );
        }
    }
A boolean that indicates if the current validity of certificates (based on their 'notBefore' and 'notAfter'
property values) is used when they are used to establish an encrypted connection.

@return true when certificates are required to be valid to establish a encrypted connection, otherwise false.
xmppserver/src/main/java/org/jivesoftware/openfire/spi/ConnectionListener.java