How to add a shared mailbox in Outlook

Right click on your mailbox and then click on Data File Properties...
Click on Advanced
Click on the Advanced tab again.
Click on the Add button
Search for the mailbox name (eg, Customer Service) then click OK
Select the correct Mailbox from the list of options then click 'OK'
The Mailbox will appear in the list of your accessible Mailboxes, click 'OK'
Exit out of all the windows and the Mailbox will now be listed in your Mail Folders. You may need to restart outlook to enable access. If you are still not allowed to access, then phone Helpdesk on 2222.

Service Desk