Here’s a quick guide borrowed from groovypost which explains how to set up an additional mailbox in Outlook 2007.
Enjoy!

Step 1

With Outlook 2007 open, Click Tools, Account Settings

Add Mailbox to Outlook 2007 :: groovyPost.com

Add Mailbox to Outlook 2007 :: groovyPost.com

Step 3

Click More Settings

Add Mailbox to Outlook 2007 :: groovyPost.com

Step 4

Click Advanced Tab then Click Add

Add Mailbox to Outlook 2007 :: groovyPost.com

Step 5

Type in name of additional / secondary mailbox and Click OK

Add Mailbox to Outlook 2007 :: groovyPost.com

Note: You must have at least READ access to new mailbox otherwise after adding, you will not be able to open new mailbox.  If you need help with this, ask your systems administrator or post your question in my Forum.

Step 6

Verify new Mailbox is listed under “Open these additional mailboxes“  Click OK

Add Mailbox to Outlook 2007 :: groovyPost.com

Step 7

Click Next

Add Mailbox to Outlook 2007 :: groovyPost.com

Step 8

Click Finish

Add Mailbox to Outlook 2007 :: groovyPost.com

Step 9

Click Close

Add Mailbox to Outlook 2007 :: groovyPost.com

That’s it!  Very simple!

Here’s what your Outlook Client will look like once your new Mailbox is added:

Add Mailbox to Outlook 2007 :: groovyPost.com