In ACLS, click on the menu item “Staff”.
In the following window, click on “Users”:
Find the user by typing his/her name into he search field :
On the user entry in the table, click on “Certificate” button underneath the user name:
On the following page that opens, the current user certificates are listed. Below the list, click on the “Choose certificate from the list” field, find the certificate in the drop down list:
Click “Accept Changes”