Detailed information on the out of box System Accounts created during the installation of Service Desk Manager
CA Service Desk Manager
12.x, 14.1 and 17.x
All Supported Operating systems
These are system generated user accounts. Each user is used by Service Desk Manager to perform tasks like closing/generating/editing a ticket for integration purposes.
In summary, here is what each user is used for:
The System_AHD_generated user should NOT be inactivated and should have a role that does not have a data partition assigned.
The others can be inactivated if integration with that product/module is not used.