You can make an exception to a recipient policy by modifying the
properties of an individual recipient. This is helpful when you
want to keep the recipient's addresses from being updated based on
a recipient policy.
On the Start menu, point to
Programs, point to Administrative Tools, and then
click Active Directory Users and Computers.
In the console tree, double-click the domain and then
double-click the Users node. If you have multiple user
nodes, click the node that contains the recipient information you
are modifying.
In the details pane, double-click the recipient you want to
exclude from the recipient policy.
On the E-Mail Addresses tab, click to clear the
Automatically update e-mail addresses based on recipient
policy check box.