If you want to add a local user, verify the From This
Location setting is your local machine. (Select
Locations to specify the local machine, if
required.). If you want to add a domain user:
Select Locations to specify the domain, if
required.
Select Entire Directory or the specific domain
underneath Entire Directory.
Select OK.
Select Advanced.
The Advanced window appears.
Select Find Now.
From the list of users, select the users or groups to add or enter the names of the users or groups you want to add in the bottom field.