Adding a Shared mailbox to your Outlook 2010 profile is very simple as long as you know where to look. Here’s the step-by-step tutorial using Outlook 2010 screenshots.
Please note: before you are able to add a shared inbox to your Outlook, you must request Simplifying IT to grant permissions between the two accounts. If this is not done before starting this tutorial, you will get an error message when trying to add a shared inbox!
Step 1. Open Outlook 2010 and Click File, Info, Account Settings
Step 2. Highlight the account and Click Change
Step 3. Click More Settings
Step 4. Click Advanced Tab then Click Add
Step 5. Type in the name of additional / secondary mailbox and Click OK
Step 6. Verify the new mailbox is listed. Click OK to save
Step 7. Click Next
Step 8. Click Finish
Step 9. Click Close
Done! Your new Mailbox should now be listed below your primary account