You are the administrator of a Windows 2000 Professional portable computer that is shared by users in the sales department.  You want to configure a roaming user profile for each user. You want each individual user profile setting to be available from any location, including by using a dial-up connection.  You log on to the computer by using the local Administrator account. You create user accounts for the users in the sales department. When you attempt to configure each individual user account profile to be a roaming profile, you find that you cannot. You receive the change Profile Type dialog box as shown in the exhibit (Click the Exhibit button)  You want to be able to configure each user account to use a roaming user profile. What should you do?（　）