Click here to access the full PDF version with screenshots. Step 1: Login to your MyNIC account and click on the Cardinal Mail button Step 2: Right click on Folders Step 3: Choose Add shared folder Step 4: The Add shared folder box will appear Step 5: Start typing in the name of the mailbox you need to add, and choose it when it shows in the list. Step 6: Once you choose the mailbox, click Add Step 7: The mailbox you added should show at the bottom on the left-hand side. Repeat Steps #2 - 7 to add another mailbox. Note: If you add a mailbox to your Office 365 account, you must have permission to that mailbox in order to see the inbox.