This feature allows you to share personal address books with specific users or groups. The shared users/groups can view, export, add, edit or delete a shared address book (if they have the Edit permission). The shared address book is distinguished from other address books by a hand symbol.
1. Right-click the address book you want to share, and select Share from the drop-down menu.
The Share an Address Book with other users form will appear.
2. Select users or groups that you want to share. For more details, see here.
The shared users/groups will be updated in the Shared Users/Groups table of the Share an Address Book with other users form.
Click
to change the Edit permission or 
to remove specific users/groups from the Share Users/Groups table.
3. Tick the Edit Permission checkbox if you want to grant the Edit permission to your selected users/groups.
4. Click Save to finish.