How to Subscribe to a Shared Address Book?
- Go to your Address Book in Thunderbird and select the button "Subscribe to an Addressbook"
 

         Subscribe to an Addressbook  
  
 
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Either (i) Type the username of the shared address book owner. Or (ii) Type public for group shared address books (owned by the system as oposed to another user).
 
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Select the Addressbook and click the Add button
 

       Select the Addressbook     
  
 
- Once you have successfully subscribed to the Shared Address Book, it will appear in your Address Books' list.
 

      Show the subscribed Address Book