To view / edit an additional system user personal details click on the 'Client / Trader Manager' in the menu list, and select the 'Manage Assistant Administrator' option then further click on the blue button under Manage User which has Suspended Account Status. Further click on the 'Reactivate Account' button. Enter 4 digit Passcode & click on the 'Confirm' button.

Roadmap:
Client / Trader Manager -> Manage Assistant Administrator -> Manage User (Suspended Account Status) -> Reactivate Account -> Enter 4 digit Passcode -> Confirm.