Each user will now need to add this contacts folder to their Outlook favorites which will allow them to see the contacts list in Outlook.
To add the folder to their favorites each user will need to do the following.
1. Open up Outlook and navigate to the folders list.
View Folders in Outlook
If they do not see the public folders section check that you have assigned the correct permissions above. If you have only just created the public folder mailbox and root public folder it may take a few hours for the public folders to appear here.
Add folder to Favorites in Outlook
2. Expand out your Public Folders and All Public Folders until you see the contacts public folder you create earlier.
3. Right click the contacts folder and click Add to Favorites.
4. Now that the folder is in your Favorites, expand the Favorites Public Folder, and right click the Contacts folder you just added and click Properties.
5. Now click on the Outlook Address Book tab and tick the Show this folder as an email Address Book box and click OK.
Add folder to Address Book
This will allow the user to view the Shared Contacts in their address book list when they create a new email messages.
Select Shared Contacts
View Shared Contacts in Address Book
They will also be able to autocomplete email addresses found in the Shared Contact list.
Auto Complete Contacts