Runtime tools : Service components : Web Messaging service : Preparation
  
Preparation
You can choose to install and configure IBM Web Application Server (WAS) or Weblogic.
▪ IBM Web Application Server
https://www.ibm.com/support/knowledgecenter/SSEQTP_9.0.0/com.ibm.websphere.base.doc/ae/welc6productov.html
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Web Messaging service