Release: CNMSPP99000-8.4-Unified Infrastructure Mgmt-Server Pack-- On Prem Component:
In CDM source name is computed as follows:
From controller’s Robot environment(Status tab of Controller->Robot environment) , value of NIM_QOS_SOURCE is picked. (This value is enabled when in Setup->Misc->Quality of service->Set QoS source to robot name instead of computer hostname is checked).
If the value is not available, then FQDN is picked
If set source name is set then, only hostname is taken(remaining is truncated).
You need to restart the robot after making the changes