Microsoft Knowledge Base Article 305144 contains the following summary:

When you open the properties for a user account, click the Account tab, and then either select or clear the check boxes in the Account options dialog box, numerical values are assigned to the UserAccountControl attribute. The value that is assigned to the attribute tells Windows which options have been enabled.

To view user accounts, click Start , point to Programs , point to Administrative Tools , and then click Active Directory Users and Computers .