How can I see clients in Kibana

I have added two (servers) clients and I am seeing only the logs for one server.
I am unable to see the logs from the other server.

And what path do the logs take before reaching ES? Are you using Logstash, for example?

Yes I am using logstash. /var/log/mysqld.log. This mysqld.log is appearing in Kibana.
However, I have another client that's point to /usr/local/tomcat/logs/catalina.log.
How can I see these logs?

Please provide your Logstash configuration. And look in your Logstash log file. I suggest you crank up the log level by starting Logstash with --verbose. That should give you additional clues.

The issue that I have is that I have several clients and when I login to Kibana I am not sure how to view all the clients log files. Can I switch the filebeat to view another client server to view log files.

As long as the logs from both servers are going into the same ES cluster you will be able to see them. Have you verified that they are both working as Magnus said?