For hiding the Apache Tomcat version from any Tomcat response, please perform the following:
1. Stop service AIS_RB
2. Open the file:
tomcat-catalina-x.x.xx.jar located under: /ais_server/alm/ws/lib
you can use 7zip or any other extracting tool

3. Browse to /org/apache/catalina/util/
4. Righ click and Edit the file: ServerInfo.properties

5. Locate the line containing the Tomcat version and comment it:
# server.info=Apache Tomcat/9.0.110 (Based on version on your system)

6. Save the file ServerInfo.properties and choose to update tomcat-catalina-x.x.xx.jar

7. Close tomcat-catalina-x.x.xx.jar
8. Restart the AIS