All Active Roles cmdlets and supported methods of retrieving Active Roles Change History require a Distinguished Name or other resolvable identifier be passed in order to return records associated with a valid Active Directory object. If an account has been deleted and removed from the Active Directory Recycle Bin, there is no valid resolvable identifier which can be passed to Active Roles.
The Change History records for deleted objects are retained in the Management History database until the next time that the Deleted Objects Cleanup Active Roles Scheduled Task is run, at which time they are deleted.