On the Start menu, point to
Programs, point to Administrative Tools, and then
click Active Directory Users and Computers.
In the console tree, expand the Windows 2000 domain.
Double-click Users, or double-click the node that contains
the recipient information you want to modify.
In the details pane, right-click the user for whom you are
enabling an Exchange feature, and then click Exchange
Tasks.
On the Exchange Task Wizard screen, click
Next.
Select the feature you want to enable, and then click
Next.