How to Add a Mailbox to Outlook 2010
Exchange server environments are great for businesses. Along with personal mailboxes, you can also have separate mailboxes for different aspects of your business. Like previous versions of Outlook, 2010 lets you take full advantage by being able to add as many mailboxes as you want to a single user account. Adding a mailbox is easy enough that even end users can do it without an IT specialist doing it for them. All you need is the mailbox name.
Click the "File" tab in the Outlook ribbon.
Locate the "Account Settings" button and then choose "Account Settings" from the drop down menu that appears.
Select "Change" above your email account in the new window that appears. Then click on "More Settings" from the bottom right of the next window.
Find and click the "Advanced" tab.
Select the "Add" button next to the "Mailboxes" window. Type in the name of the mailbox you want to add. If you do not know the exact name, consult your Exchange administrator.
Point and click the "OK" button. You will be returned to the "Server Settings" window. Click "Next" at the bottom of the window.
Click the "Finish" button. Your new mailbox has been added and should appear at the bottom of the list under the mail folders in Outlook.