When the Assign Employees to Projects option is enabled in Utilities - System Setup - System Options - Time and Expense, you can assign an employee to specific projects.
This restricts the employee's access so that they see only clients with projects to which they are assigned. Employees can also record chargeable time only in projects to which they are assigned.
So when this option is enabled, an employee can see only:
Administration clients.
If the system has an administration client, all employees can record non-chargeable time against it. They don't need to be assigned to it.
To assign an employee, or a number of employees, to a project, carry out these steps:
Select one or more employees to assign to the project.
Alternatively, click Select All Employees to select everyone in the list.
You have assigned one or more employees to the project.