Hi Team,
after doing some research I found the solution as Steve suggested.
This documentation helps to do the definitions:
https://community.jaspersoft.com/wiki/how-deploy-and-use-data-adapter-jasperreports-server-v56
Another problem I had was the direct link to the MdB, using the Microsoft driver. To manage this
sqljdbc.jar has to exist in the directory
C:\Program Files\CA\SC\CA Business Intelligence\apache-tomcat\webapps\jasperserver-pro\WEB-INF\lib
I did a small documentation in German, I will translate and attach it.
Regards
Baerbel