ChangeMan requests are processed in application server address spaces. A single group of application server address spaces can be defined for ChangeMan processing. The parameters in the group definition provide information that Mainframe Access Server needs in order to start and manage the associated address spaces.
ChangeMan processing is associated with a specific address space group by the Mainframe Access Server startup parameter CHANGEMAN_ASGROUP in the PARMS member. You may want to create a distinct ASGROUP definition for ChangeMan processing. This might be done to separate the workload for usage reporting, workload management, etc.
The MFAAS JCL sample referenced in the address space group definition contains comments that describe how to customize this JCL for ChangeMan processing.