To do this task
Click the Employee Center icon and then click the Employees tab.
Click the View drop-down arrow (at the top of the list) and then click All Employees.
Inactive employees appear with an X next to their names.
Double-click the employee who you want to make active again.
In the Edit Employee window, click the Employee is inactive checkbox to clear it.
The employee appears as active in the list (with the X removed).