if (logger.isDebugEnabled()) {
                logger.debug("bindDn or groupName is blank: bindDn={}, groupName={}", bindDn, groupName);
            }
            return OptionalEntity.empty();
        }

        final Hashtable<String, String> env = createSearchEnv();
        try (DirContextHolder holder = getDirContext(() -> env)) {
            final DirContext context = holder.get();

				"application/vnd.openxmlformats-officedocument.wordprocessingml.document",
				"application/vnd.openxmlformats-officedocument.wordprocessingml.template",
				"application/vnd.osa.netdeploy",
				"application/vnd.osgi.bundle",
				"application/vnd.osgi.dp",
				"application/vnd.otps.ct-kip+xml",
				"application/vnd.palm",
				"application/vnd.paos.xml",
				"application/vnd.pg.format",
				"application/vnd.pg.osasli",