How to remove an employee?
In order to revoke access to the system for an employee, you can simply remove the employee. The process has been described in a separate article.
Reports of the removed employee
Data of the archived employee are in the reports. You can find the employee in the filter, just start typing his/her name or email.
In the Requests report you can also mark a checkbox "Include archived":
Details of the removed employee
You can also find the removed employee on the list of Employees in "Configuration → People→Archived"