To provide privacy for your Instant Messaging users and servers,
you may need to designate which groups of users and servers can
access an Instant Messaging user's presence
information and send messages to that user.
On the Start menu, point to
Programs, point to Administrative Tools, and then
click Active Directory Users and Computers.
In the console tree, select the Windows 2000 domain in which
you want to protect Instant Messaging users, and then click
In the details pane, right-click a user name, and then click
Click the Exchange Features tab.
Click Instant Messaging, and then click
On the Privacy tab, select one of the following privacy
Allow access only from these servers and users
Allow access by all servers and users except
Type the Instant Messaging URL or server name. For example, to
block a user with the Instant Messaging Address
"email@example.com," enter the following URL:
Repeat the previous two steps for each user address and server