Here you can link the employee to a user in Astrow Web. Go to Configuration - Employees- New/Edit - tab System - Assigned users,click the button and select the user listed in the new window opened.
Assigning a user to an employee in New/Edit Employee Window in Astrow Web
To add a user, click . Once you name it, you can edit it by adding or deleting permissions or customize the view in the application for a user.
To edit a user, click or double click on it. To delete a user, select it and click .
If you delete a user linked to an employee, also the link is deleted. In this case the employee should be linked to other defined user in order to use Astrow Web. System users cannot be deleted! They can only be edited.
You can also search a user by user name, email or employee name.
and select the user listed in the new window opened. 
. Once you name it, you can edit it by adding or deleting permissions or customize the view in the application for a user.
or double click on it. To delete a user, select it and click 
. 
a user by user name, email or employee name.