Hi, I am using ACT to load test web service, I think the same question applies to Web test, too. My WebService takes a user account id that is associated with the user name. I can define User Groups in ACT with many different users, but how do I code their specific user account id in the script? Say, user1 has account1, user2 has account2, etc. In the script, I need to define a variable that changes at run-time depends on the user it uses to call web service. Any suggestion? Thanks. Yan