You can make use of Address Book Views .
Address Book views is a feature that allows administrators to control which
entries users are allowed to see in the global address book. This feature
also allows users to sort their views of the Address Book by mailbox
attribute, depending on the permissions they have been granted by the
administrator. Address Book views are grouped into containers that contain
recipients with common attributes.
When you create an Address Book view, you can group mailboxes by any four
of eight standard attributes and ten custom defined attributes.
Subcontainers are created that correspond to the four groupings. In
addition, you, as an administrator, can assign search roles to the view.
The search role limits who has access to an address book view. Thus, you
can limit users search capabilities to only those containers for which
they have permissions.
Clients not on a local area network (LAN) or wide area network (WAN) who
are working offline will see a different view. They will view the offline
Address Book. If Address Book views for the offline Address Book are put
in place before the first synchronization of the offline Address Book , the
offline user is presented with a choice of address book views to download,
depending on their permissions. However, if the client who is working
offline has downloaded a full copy of the offline Address Book before the
address views have been implemented, that client will always be able to see
the full membership of the offline Address Book . If you subsequently limit
that clients access by using address book views, the client will still be
able to view all the members of the Address Book that were replicated to
the offline Address Book .
Lightweight Directory Access Protocol (LDAP) clients can access Microsoft
Exchange Server Address Books, and the same permissions and views apply as
for Messaging Application Programming Interface (MAPI) clients.
Greetings & Wishes
Suresh Babu Kandoth