Configuring CICS Users to be logged in just once with same UserID

Problem

Is it possible to configure CICS Users so that they can only be logged on once with the same USERID?

Resolution

This can be enabled by adding the environment variable:-

   ES_CICS_SINGLE=Y

The simplest method to set this up is add in in the Configuration Information for the CICS REGION with:-

   [ES-Environment]
   ES_CICS_SINGLE=Y